Boeing tumbled early Monday on heightened scrutiny by regulators and prosecutors over whether the approval process for the company’s 737 Max jetliner was flawed.

A person familiar with the matter on Sunday said that the U.S. Transportation Department’s Inspector General was examining the plane’s design certification before the second of two deadly crashes of the almost brand-new aircraft.

Separately, the Wall Street Journal reported that a grand jury in Washington, D.C., on March 11 issued a subpoena to at least one person involved in the development process of the Max. And a Seattle Times investigation found that U.S. regulators delegated much of the plane’s safety assessment to Boeing and that the company in turn delivered an analysis with crucial flaws.

Boeing dropped 2.8 percent to $368.53 before the start of regular trading Monday in New York, well below any closing price since the deadly crash of Ethiopian Airlines Flight 302 on March 10. Ethiopia’s transport minister said Sunday that flight-data recorders showed “clear similarities” between the crashes of that plane and Lion Air Flight 610 last October.

Read more: Q&A on Boeing’s 737 Max crisis

U.S. Federal Aviation Administration employees warned as early as seven years ago that Boeing had too much sway over safety approvals of new aircraft, prompting an investigation by Transportation Department auditors who confirmed the agency hadn’t done enough to “hold Boeing accountable.”

The 2012 investigation also found that discord over Boeing’s treatment had created a “negative work environment” among FAA employees who approve new and modified aircraft designs, with many of them saying they’d faced retaliation for speaking up. Their concerns pre-dated the 737 Max development.

In recent years, the FAA has shifted more authority over the approval of new aircraft to the manufacturer itself, even allowing Boeing to choose many of the personnel who oversee tests and vouch for safety. Just in the past few months, Congress expanded the outsourcing arrangement even further.

“It raises for me the question of whether the agency is properly funded, properly staffed and whether there has been enough independent oversight,” said Jim Hall, who was chairman of the National Transportation Safety Board from 1994 to 2001 and is now an aviation-safety consultant.

Outsourcing Safety

At least a portion of the flight-control software suspected in the 737 Max crashes was certified by one or more Boeing employees who worked in the outsourcing arrangement, according to one person familiar with the work who wasn’t authorized to speak about the matter.

The Wall Street Journal first reported the inspector general’s latest inquiry. The watchdog is trying to assess whether the FAA used appropriate design standards and engineering analysis in approving the 737 Max’s anti-stall system, the newspaper said.

Both Boeing and the Transportation Department declined to comment about that inquiry.

In a statement on Sunday, the agency said its “aircraft certification processes are well established and have consistently produced safe aircraft designs,” adding that the “737 Max certification program followed the FAA’s standard certification process.”

The Ethiopian Airlines plane crashed minutes after it took off from Addis Ababa, killing all 157 people on board. The accident prompted most of the world to ground Boeing’s 737 Max 8 aircraft on safety concerns, coming on the heels of the October crash of a Max 8 operated by Indonesia’s Lion Air that killed 189 people. Much of the attention focused on a flight-control system that can automatically push a plane into a catastrophic nose dive if it malfunctions and pilots don’t react properly.

In one of the most detailed descriptions yet of the relationship between Boeing and the FAA during the 737 Max’s certification, the Seattle Times quoted unnamed engineers who said the planemaker had understated the power of the flight-control software in a System Safety Analysis submitted to the FAA. The newspaper said the analysis also failed to account for how the system could reset itself each time a pilot responded — in essence, gradually ratcheting the horizontal stabilizer into a dive position.

Software Fix

Boeing told the newspaper in a statement that the FAA had reviewed the company’s data and concluded the aircraft “met all certification and regulatory requirements.” The company, which is based in Chicago but designs and builds commercial jets in the Seattle area, said there are “some significant mischaracterizations” in the engineers’ comments.

In a separate statement Sunday, Boeing Chief Executive Officer Dennis Muilenburg reiterated the company’s sympathies for the affected families and support for the investigation into the flight-control system, known as the Maneuvering Characteristics Augmentation System.

“While investigators continue to work to establish definitive conclusions, Boeing is finalizing its development of a previously announced software update and pilot training revision that will address the MCAS flight-control law’s behavior in response to erroneous sensor inputs,” Muilenburg said.

The newspaper also quoted unnamed FAA technical experts who said managers prodded them to speed up the certification process as development of the Max was nine months behind that of rival Airbus SE’s A320neo.

The FAA has let technical experts at aircraft makers act as its representatives to perform certain tests and approve some parts for decades. The FAA expanded the scope of that program in 2005 to address concerns about adequately keeping pace with its workload. Known as Organization Designation Authorization, or ODA, it let Boeing and other manufacturers choose the employees who approve design work on the agency’s behalf.

Previously, the FAA approved each appointment. Under the new approach, which was fully implemented in 2009, the ODA representatives are still under U.S. legal requirements and the FAA has the authority to oversee them and request that their management be changed.

Anonymous Faxes

In 2012, a special investigator of the Office of Inspector General at the Department of Transportation sent a memo to the FAA’s audit chief warning him of concerns voiced by agency employees about the new process. Some allegations were made in anonymous faxes sent to the inspector general’s office, and the office followed up by interviewing employees in the FAA’s Transport Airplane Directorate.

“Our investigation substantiated employee allegations that TAD and FAA headquarters managers have not always supported TAD employee efforts to hold Boeing accountable and this has created a negative atmosphere within the TAD,” according to the June 22, 2012, report sent to the FAA. (The memo was made available later in a public records request and appears now on a website operated by governmentattic.org, which warehouses government documents. A spokesman for the inspector general’s office confirmed its authenticity.)

The employees told the investigators that managers had overturned a recommendation by staff to remove the administrator Boeing had chosen for the program and “had not adequately addressed employees’ concerns” about potential conflicts of interest, the memo said. The employees, it said, viewed this as evidence of management having “too close a relationship with Boeing officials.”

Despite those concerns, as well as others raised in a subsequent report by the inspector general, Congress has embraced the program as a way to improve the FAA’s efficiency.

President Donald Trump signed into law a change on Oct. 5. It allows manufacturers to request that the FAA eliminate limitations on how company representatives certify “low and medium risk” items, giving them even more authority over their own products.

The agency doesn’t have the budget to do every test, and “the use of designees is absolutely necessary,” said Steve Wallace, the former head of accident investigations at the FAA. “For the most part, it works extremely well. There is a very high degree of integrity in the system.”

Dreamliner Fires

But the program was also at issue in the FAA’s 2013 grounding of Boeing’s 787 Dreamliner after two fires of battery packs. Boeing’s designated engineering representatives oversaw tests of the battery packs.

A 2015 report by the Department of Transportation’s inspector general, requested by U.S. Representative Peter DeFazio, found the FAA lacked “an effective staffing model” and “risk-based oversight process” over the ODA program.

DeFazio, an Oregon Democrat, now heads the House transportation and infrastructure committee, and has said he will conduct a “rigorous investigation” to make sure the FAA is protecting safety.

Hall, the former NTSB chairman, said the agency’s move to shift power to the manufacturers contributed to the unusual situation in which two of Boeing’s newly introduced aircraft were grounded in a period of six years. Before the Dreamliner, the FAA hadn’t grounded a model since 1979.

“When I was chairman of the NTSB, my single most important job was who we hired,” Hall said. “Do we have in the federal government the level of funding and expertise we need? Are we attracting the kind of young, smart minds that continue to uphold our reputation in the aviation area?”

As the investigation continues, mourners marched in the hundreds past the Library of Parliament in Addis Ababa to Selassie Cathedral for a funeral service Sunday, wearing black or the sea-green uniforms of Ethiopian Airlines and carrying photos of the dead. After a priest read the victims’ names aloud, people carried empty coffins from the cathedral to a graveyard. All that was heard was sobbing, wailing and chanting.

Another month, another “supermoon”. Tonight, the “super worm moon”—the third supermoon of 2019 to be exact— will light up the sky in all its slightly-larger-than-usual glory. What makes this full moon extra special is that it is coinciding with the Spring Equinox, or the first day of spring in the northern hemisphere, a rare astronomical coincidence.

For those who are exhausted by all the recent supermoons, the “super worm moon” will be the last supermoon of the year. However, for those who couldn’t get enough of February’s “super snow moon” or January’s “super blood wolf moon” eclipse, the “super worm moon” will be the last opportunity for a while to see a supermoon.

Here’s what you need to know about March 2019’s “super worm moon,” and the best time to see it.

What is a super worm moon?

A supermoon — which typically happens two to three times per year — is a full moon that occurs at the moon’s perigee, the point in the moon’s orbit when it is closest to the earth, making it appear bigger and brighter in the sky. Because the moon’s orbit is shaped more like an egg, as opposed to a perfect circle. (Conversely, the apogee is the point when the moon is farthest from earth.)

However, it is relatively rare for a supermoon to coincide with the Spring Equinox. The last time the cosmic alignment happened was in 2000, and it won’t occur again until 2038.

Why is it called a super worm moon?

The “worm moon” is the third moon of the year, and comes from historic Native American naming conventions for full moons. According to the Farmer’s Almanac, the March full moon is called the “worm moon” because it is around this time of year that the ground softens and worms begin to appear in the soil again, marking the beginning of Spring. The March full moon is also sometimes referred to as the “sap moon” as it marks the time of year when sugar maples begin to release their sap.

When can people see the super worm moon?

The moon will technically reach peak fullness at 9:42 p.m. EST on March 20, approximately four hours after the vernal equinox at 5:42 p.m. EST, according to timeanddate.com. Moonrise will happen soon after, but will vary depending on your location. For cities in the continental U.S., moonrise will occur sometime between 6:30 and 7:30 p.m. local time. To check the exact time for where you live, go here. For those trying to get a good photo of the “super worm moon,” the best strategy is to aim for a time near moonrise, as the moon appears larger the closer it is to the horizon, due to an optical illusion.

What will the super worm moon look like?

While the “super worm moon” won’t be as big and bright as last month’s “super snow moon,” it will still be quite the photogenic spectacle. Past supermoons have been the subject of interesting photos from around the world.

If you can’t make it outside, or have the misfortune of a cloudy sky, you can watch the livestream of the “super worm moon” from the Virtual Telescope Project below:

When’s the next big full moon?

The “super worm moon” is the last supermoon of 2019. The next supermoons are set to light up the skies on March 9 and April 8, 2020.

While Jacqueline Lee Bouvier Kennedy was the one married to President John F. Kennedy, many Americans felt married to the idea of the two of them. Their relationship was central to the concept of the Kennedy “Camelot” that is still the object of so much national nostalgia.

So it was that many took the news hard when, nearly five years later after his assassination, the 39-year-old former First Lady felt ready to move on.

She remarried 50 years ago this Saturday, wedding the flamboyant Greek shipping tycoon Aristotle “Ari” Onassis, who claimed to be 62 but had once had a passport that placed him a few years older than that. “Everything, from sugared almonds to the waiting yacht, was ready to celebrate the new life of Mr. and Mrs. Aristotle Onassis,” TIME noted in its coverage of the secret Greek Orthodox wedding ceremony. “Everything, that is, except what is known as ‘the world,’ which seemed unable to comprehend or accept the match.”

The magazine explained the level of shock in that Oct. 25, 1968, cover story:

The nuptials also came as a shock in a more basic sense because of how suddenly the wedding happened.

Even the bride’s mother said it was a surprise, and LIFE magazine quoted her as saying her daughter informed her by calling to ask her if she could get on a plane the very next day. Jackie’s younger sister Lee Radziwill said the engagement was a surprise to her too. She had dated Onassis previously, and the way the news was handled would end up souring their relationship.

However, in the context of the other shocking events of the momentous year that was 1968, covering the wedding, as former Time Inc. publisher James R. Shepley wrote in a note to readers, “offered a pleasant, if hectic, change of pace” for reporters “in a year that has seen more than its share of grim news.”

Unsurprisingly, there was a lot of speculation about what exactly drew the two together. Some Kennedy-watchers speculated that she, as a paparazzi target, was attracted to his private security detail. “The idea that he owned a yacht and could just literally sail her away from all of her troubles and take her to this private island, a place where she could just be reclusive, was incredibly appealing,” Tina Cassidy, author of a biography of the former First Lady, Jackie After O, says in the 2017 documentary Jackie: A Tale of Two Sisters. But he also had had his eye on her for a while. Cassidy notes that he was one of the first visitors to the White House after the assassination, arguing, “I think people also believed that Onassis was always looking for an angle with Jackie, and it wasn’t until after Robert Kennedy’s assassination that he felt like he had a window and could put the moves on her.”

Unfortunately, the pair did not live happily ever after.

As TIME reported in his 1975 obituary, “After the honeymoon, the marriage was filled with what one intimate of Ari’s called ‘the nights of long silences.’ Jackie loved concerts, ballet and theater; Onassis preferred raucous bouzouki music, belly dancers and at times the company of roistering Greek businessmen. Much of the time they lived separate lives.” He was never the same after the sudden death in 1973 of his only son. He expressed the idea that President Kennedy’s death had cursed his wife, and in turn, him, calling her “the witch,” according to TIME’s 1994 obituary for the former First Lady.

But the public, even after the wedding, maintained its soft spot for Jackie. She became “Jackie O.,” a nickname that first appeared in the pages of TIME a few months after the wedding, and the fascination with her life never faded — even when it was impossible to know the exact reason for every little thing going wrong in it. In fact, as a symbol of grace in times of sadness, her personal struggles perhaps in the end made Americans love her even more.

(Bloomberg) — Internal emails at Facebook Inc., including those involving Chief Executive Officer Mark Zuckerberg, were published online by a committee of U.K. lawmakers investigating social media’s role in the spread of fake news.

The documents, which had been sealed by a California court, led lawmakers to conclude that Facebook undertook deals with third party apps that continued to allow access to personal data.

Damian Collins, head of the committee, added that Facebook shut off access to data required by competing apps, conducted global surveys of the usage of mobile apps by customers possibly without their knowledge, and that a change to Facebook’s Android app policy that resulted in call and message data being recorded was deliberately made difficult for users to know about.

In one email, dated Jan. 23 2013, a Facebook engineer contacted Zuckerberg to say that rival Twitter Inc. had launched its Vine video-sharing tool, which users could connect to Facebook to find their friends there. The engineer suggested shutting down Vine’s access to the friends feature, to which Zuckerberg replied, “Yup, go for it.”

“We don’t feel we have had straight answers from Facebook on these important issues, which is why we are releasing the documents,” said Collins in a Twitter post accompanying the published emails.

The senior lawmaker said last week that he would release the emails and that he was free under U.K. law to do so. He’d obtained the documents after compelling the founder of U.S. software company Six4Three to hand them over during a business trip to London.

A spokesman for Facebook was unable to immediately comment.

Six4Three’s founder, Ted Kramer, had obtained them as part of a legal discovery process in a U.S. lawsuit against Facebook that his company has brought against the social network in California.

Facebook touted itself as championing privacy four years ago when it decided to restrict outsider developers’ access to data about its users’ friends.

In one email, dated Feb. 4, 2015, a Facebook engineer said a feature of the Android Facebook app that would “continually upload” a user’s call and SMS history would be a “high-risk thing to do from a PR perspective.” A subsequent email suggests users wouldn’t need to be prompted to give permission for this feature to be activated.

Kramer was ordered by a judge on Friday to surrender his laptop to a forensic expert after admitting he turned over the documents to the British lawmakers, in violation of a U.S. court order.

“What has happened here is unconscionable,” California Superior Court Judge V. Raymond Swope said to Kramer and his attorneys during the hearing.

Facebook wants the laptop to be evaluated to determine what happened in the U.K., to what extent the court order was breached, and how much of its confidential information has been divulged to the committee.

Elon Musk released footage Sunday revealing the first firing of a new SpaceX flight engine.

The founder of Tesla tweeted photos and video of the new Raptor rocket engine, which is supposed to power a prototype Starship that will take people around the world. One day Musk envisions the rocket will take people to Mars.

A prototype version of the Starship, called the Starship Hopper, is being built at a separate SpaceX branch in south Texas, Geekwire reports. Testing for the starship could begin within the next month or two.

A solar storm this week will heighten the Earth’s auroras, making the stunning northern lights visible to the northern-most parts of the United States.

Lasting from Wednesday through Thursday, the geomagnetic storm will also impact the Earth’s magnetosphere — or magnetic field, which is impacted by changing solar winds. That means the storm could cause minor “power grid fluctuations” and have small impacts on orbiting satellites, according to the Space Weather Prediction Center from the National Oceanic and Atmospheric Administration.

It appears this upcoming event will allow residents in U.S. to catch a rare glimpse of the northern lights. The center says residents in the northern tier of the U.S., including Michigan and Maine, may be able to see the auroras.

According to a graph from the space center, it also appears states like North Dakota, South Dakota, Minnesota and Wisconsin could also see the lights as a result of the storm. In addition, the northern-most part of Ireland, Norway, and parts of Sweden and Finland can see the lights.

The minor storm is classified as G1, which is the lowest on the scale of intensity from the Space Weather Prediction Center. These kinds of storms occur about 2,000 times over 11 years, the center says, which amounts to more than 180 times per year. The highest level of this kind of storm is a G5, which would involve a “high frequency radio blackout” on the sunlit side of the world for several hours, according to the center. Those come once every 11 years. The largest of these storms come as a result of the release of plasma from the Sun’s corona, called coronal mass ejections, that arrive at Earth and disturb its magnetic fields.

The Jurassic Park franchise — including Jurassic World: Fallen Kingdom, in theaters Friday, almost exactly 25 years after the first movie came out in 1993 — is obviously entirely fictional, so you don’t have to worry that the dinos are coming to get you. But that doesn’t mean there’s not something real at its heart: the story was in fact inspired by important changes in the scientific world.

And, over the course of the franchise, though they might not get everything right, the filmmakers have incorporated some expert advice on how to make the dinosaurs in the movie the most realistic depictions possible.

Here’s a look at how the real evolution of dinosaurs influenced the dinosaurs onscreen:

How Scientific Discoveries Inspired the Franchise

When Michael Crichton wrote the 1990 sci-fi novel that inspired the first Jurassic Park movie in 1993, he was inspired by paleontologist Jack Horner’s 1988 book Digging Dinosaurs, on dinosaur behavior and discoveries made in the prior decades. “He bases the character of Alan Grant on a guy digging up baby dinosaurs in Montana at a place called Egg Hill and [my site] was called Egg Mountain,” Horner tells TIME.

A “dinosaur renaissance” had kicked off in the ’60s and ’70s, according to paleontologists. That didn’t mean there wasn’t interest in dinosaurs before the 1960s. In fact, as Daniel Barta, a paleontologist at the American Museum of Natural History, explains, there was a great deal of interest in paleontology in the Victoria era and the decades that followed, especially after scientists first recognized dinosaurs as a specific group. But interest in dinosaurs dried up during World War II, as did funding to study them, while the world focused on the war and scientists were drafted. When they returned their studies in the post-war years, they ended up breaking new ground — literally.

“Back in the ’60s, there were still large parts of the West where nobody thought to look for dinosaurs or that they hadn’t explored in a long time,” says Barta. “There were excavations in Wyoming and Montana, where people were uncovering these huge dinosaurs and that was the beginning of the public’s love affair with dinosaurs.”

Paleontologist John Ostrom’s discovery of Deinonychus, a close relative of the better-known Velociraptor, in August of 1964, sparked particular interest. He argued dinosaurs didn’t drag their tails on the ground like people thought they did, and also popularized the idea that dinosaurs were more like warm-blooded birds than cold-blooded reptiles. There was still limited evidence for his argument, but Horner’s research in the late ’70s helped validate Ostrom’s findings when his team uncovered the remains of baby dinosaur nesting grounds in Montana. They found evidence that suggested that dinosaur parents were bringing food for the babies, and that dinosaurs traveled in herds. Horner wrote about these findings and others in Digging Dinosaurs.

Before these discoveries, “dinosaurs were seen as evolutionary failures, sluggish and corpulent reptiles — and also as a group that no self-respecting scientist wanted to spend much time studying,” Matthew T. Carrano, Curator of Dinosauria at the Smithsonian, told TIME in an email. “But largely thanks to the careful research and discoveries of scientists like John Ostrom, two things became clear. First, dinosaurs were in fact lively, active animals that were more like birds and mammals than lizards or snakes. Second, birds were the direct living descendants of dinosaurs. These twin realizations utterly changed our perception of dinosaurs both scientifically and culturally — and I think Jurassic Park is a tangible reflection of that.”

What Jurassic Park Gets Right About Dinosaurs

Carrano gave Jurassic Park high marks for the basics of the dinosaurs that show up in the franchise. “The franchise gets one very important thing right: dinosaurs were once active, living things that were as successful on land as any animals before or since,” he added.

Proof that the franchise has earned the respect of paleontologists is the fact that the Society of Vertebrate Paleontology has recognized Steven Spielberg — who directed the first two films and has been executive producer on the others — for his contributions to the field. After all, he helped dinosaurs become perhaps more popular than they’ve ever been.

Carrano noted that as a kid who grew up wanting to be a paleontologist in the ’70s, he struggled to find new books to read. “Now, it’s impossible to keep up with the books published each year. Scientifically, dinosaurs went from being a weekday-night show at an off-off-Broadway theater, to a sold-out long-running juggernaut with a movie deal. It’s night and day… Errors are mostly forgivable, because the movie succeeds at making dinosaurs exciting, interesting, and something to root for.”

“[The year the first Jurassic Park came out] is the first time we actually see dinosaurs depicted as smarter, more agile, and faster than people had thought previously,” echoes Horner. “People had thought of dinosaurs as big stupid lizards wandering around looking for a place to go extinct.”

How dinosaur tails appear in the films best illustrates this milestone, as a visible example of the change in perception of dinosaurs. Before the milestone scientific discoveries in the ’60s, skeletons of dinosaurs depicted their tails dragging on the ground because that’s what lizards’ tails are like. Jurassic Park depicted dinosaurs with their tails sticking straight out. “It goes back to the late 1800s when the first dinosaur skeleton was put together, because the teeth looked like those of an iguana. They decided the tail of a dinosaur should be on the ground, [believing that] dinosaurs were ordinary lizards — just big,” says Horner.

The movie also depicted them as traveling in herds, as birds would travel in flocks, and Barta gives a thumbs up to Jurassic Park III‘s depiction of a paleontology camp.

What Jurassic Park Gets Wrong About Dinosaurs

But, while the franchise has helped spread the word on some truths about dinos, it has also introduced new misconceptions. In particular, one question that paleontologists didn’t often have to field before Jurassic Park is whether dinosaur DNA exists and if dinosaurs can be cloned. “We all know now to anticipate that question,” says Barta. “The oldest DNA that has been recovered from fossil record is well under a million years old, and these non-bird dinosaurs all died out 65 million years ago. Because [DNA] is a fragile molecule, it’s not thought to have survived as far back as the Jurassic period.” (Horner explains that, in 1993, when the first movie was made, scientists didn’t yet know that they wouldn’t be able to find dinosaur DNA, adding that he and a grad student tried.)

The films tend to be off on the sizes of some dinosaurs, and filmmakers have invented new functions for some of their physical attributes.

The Velociraptor is one of the dinosaurs that the movie depicts as larger than it would have been in real life. (Carrano says it should be just about three feet tall.). Ankylosaurus is depicted with a club on its tail for self-defense, but that was probably for wooing the ladies, says Horner, and the Mosasaurus in Jurassic World (2015) is depicted as about the size of a whale when it would have been half that length, according to Barta. The opposite is the case with Dilophosaurus.“The Dilophosaurus would have been larger than it was portrayed in the movie, and overall, is the most inaccurate dinosaur in the movies,” says Barta. “We wouldn’t be able to have fossilized evidence of a poison gland or a bony structure near the throat for the support of anything like a frill. We have no evidence for either of those things in actual fossils.”

Those who find the Tyrannosaurus terrifying will be relieved to hear that it wouldn’t have able to run because it didn’t have large enough muscles, and that the dinosaurs probably sounded less scary too — scientists believe they grunted and hissed but probably didn’t really roar.

In terms of the physical environment, some people might walk away from the movies or other pop depictions of dinosaurs and think that dinosaurs only lived in swamps and jungles, when in fact, the world’s climate when they were really around “still would have been quite seasonal and temperate,” says Barta.

Appearance-wise, the biggest inaccuracy in Jurassic Park‘s dinosaurs is the lack of feathers and colorful plumage, some knowledge about which has been gained in the years since the franchise debuted. Horner says the dinosaurs were as accurate as possible when they were made, but because filmmakers need to preserve continuity, later discoveries wouldn’t have been incorporated in sequels. In later films, he says, “we knew Velociraptor should have feathers and be more colorful, but we couldn’t really change that look because everything goes back to the first movie.”

New Dinosaurs in Fallen Kingdom

But, the new film does feature species of dinosaurs that haven’t been in previous films, in an effort to incorporate dinosaurs from new places — like Carnotaurus, a meat-eating dinosaur that roamed South America, and the Baryonyx from England. “We don’t know much about [Carnotaurus],” says Horner. “It’s got tiny little arms even smaller than T-rex, and weird little teeth, so we don’t know what it evolved to eat.”

But the most scientifically mysterious dinosaur in the franchise may still be one of the best-known ones in popular culture: the Brachiosaurus, the first dinosaur that Bryce Dallas Howard and Chris Pratt encounter in awe when they reach Isla Nublar in the new movie.

“We don’t know much about them, but once we really understand a Brachiosaurus or any of the long-necked dinosaurs, we’ll probably know most of the things we need to know about dinosaurs,” says Horner. “They’re probably a key to them all, but they’re just horribly big and horrible to dig up. Every part of them is so gigantic so it takes a long time.”

Instagram co-founders Kevin Systrom and Mike Krieger are leaving the company, they said in a surprise announcement late Monday.

“We’re planning on taking some time off to explore our curiosity and creativity again,” Systrom, Instagram’s CEO, said in a statement. “We remain excited for the future of Instagram and Facebook in the coming years as we transition from leaders to two users in a billion.”

Systrom, 34, and Krieger, 32, have not given a reason for the timing of their departures. But Bloomberg reported that they were leaving after “growing tensions” over Facebook CEO Mark Zuckerberg’s increasing involvement in the day-to-day running of Instagram.

Instagram had previously been seen as largely autonomous from Facebook’s influence. The app recently introduced features aimed to compete with rival Snapchat, a rising threat to both Instagram and Facebook that has since been quieted.

Facebook bought the photo-sharing app for $1 billion in 2012. Back then, it was used by around 30 million people. Under Facebook’s umbrella, it has grown to reach over a billion people, making it one of the social media giant’s most successful acquisitions. Analysts say Instagram is one of Facebook’s most important businesses, and one which generates the least controversy.

Instagram is the third Facebook-owned business whose founders have left recently. Jan Koum, who helped start WhatsApp in 2009, resigned in April over disagreements about privacy and encryption. Virtual reality firm Oculus VR lost founder Palmer Luckey in March 2017 amid a series of scandals and lawsuits.

Facebook has faced numerous stumbling blocks in the last two years, including scandals over its privacy practices and failure to prevent the spread of false information during the 2016 election, as well as slowing growth.

Facebook shares were down 2% in pre-market trading on Tuesday.

Democratic presidential candidate Elizabeth Warren is proposing to break up the largest technology companies, including Amazon.com, Alphabet’s Google and Facebook, calling them anti-competitive behemoths that are crowding out competition.

The Massachusetts senator is calling for legislation that would designate the companies as “platform utilities” and the appointment of regulators who would unwind technology mergers that undermine competition and harm innovation and small businesses.

“Twenty-five years ago, Facebook, Google, and Amazon didn’t exist,” Warren wrote in a post on Medium Friday. “Now they are among the most valuable and well-known companies in the world. It’s a great story — but also one that highlights why the government must break up monopolies and promote competitive markets.”

Facebook declined to comment. Representatives of Google and Amazon didn’t immediately respond to a request for a reaction. Shares of Amazon, Alphabet and Facebook all extended losses on the news, sliding as much as 1.5 percent. The stocks were already lower after disappointing payrolls data.

“Today’s big tech companies have too much power — too much power over our economy, our society, and our democracy,” Warren said. “They’ve bulldozed competition, used our private information for profit, and tilted the playing field against everyone else. And in the process, they have hurt small businesses and stifled innovation.”

Warren said “weak antitrust enforcement” has resulted in a reduction of competition and innovation in the tech sector and lax venture capitalist investment in new startups to compete with big tech companies “because it’s so easy for the big companies to either snap up growing competitors or drive them out of business.”

Warren’s economic populism, paired with fierce attacks on corporations and wealthy Americans who she says are rigging the system for self-interest, is at the heart of her campaign in a crowded field of contenders for the Democratic presidential nomination in 2020.