Skip to main content

Ancient crater the size of NYC discovered under the Greenland ice sheet

A huge crater has been discovered beneath the ice of Greenland, and is thought to be the result of a meteorite impact millions of years ago. The crater is one of the largest ever discovered, and the first to be found beneath the Greenland ice sheet.

An international team of scientists led by researchers at University of Copenhagen’s Centre for GeoGenetics at the Natural History Museum of Denmark has been studying the crater since July 2015, when it was spotted using ice-penetrating radar data from a NASA mission to log changes to polar ice. The team noted a huge depression beneath the Hiawatha Glacier in northwestern Greenland and decided to investigate further by looking at both radar data and images of the surface ice in the area. The surface ice showed a circular pattern similar to the pattern in the topography map, suggesting that the formation was very old.

Recommended Videos

The team then flew a research plane over the area to collect a more detailed radar data survey. Joe MacGregor,  a NASA glaciologist at Goddard Space Flight Center in Greenbelt, Maryland, was part of the survey and explained: “What we really needed to test our hypothesis [that there was a crater in the area] was a dense and focused radar survey there. The survey exceeded all expectations and imaged the depression in stunning detail: a distinctly circular rim, central uplift, disturbed and undisturbed ice layering, and basal debris — it’s all there.”

Massive Crater Discovered Under Greenland Ice

The crater measures approximately 19 miles across and is around 1,000 feet deep, meaning that it is around the size of New York City. It formed less than 3 million years ago, likely when an huge meteorite made of iron and measuring more than half a mile wide smashed into the Earth, and is thought to be one of the youngest large impact craters on Earth. The crater remains in surprisingly good condition considering it has been covered in glacier ice which typically erodes traces in rock, suggesting that the impact occurred toward the end of the last ice age.

The data is published in Science Advances and will be followed up with more research into what the consequences of the huge meteorite impact could have been on the climate of Earth and the lifeforms that existed there at the time.

Georgina Torbet
Georgina has been the space writer at Digital Trends space writer for six years, covering human space exploration, planetary…
Google Gemini’s best AI tricks finally land on Microsoft Copilot
Copilot app for Mac

Microsoft’s Copilot had a rather splashy AI upgrade fest at the company’s recent event. Microsoft made a total of nine product announcements, which include the agentic trick called Actions, Memory, Vision, Pages, Shopping, and Copilot Search. 

A healthy few have already appeared on rival AI products such as Google’s Gemini and OpenAI’s ChatGPT, alongside much smaller players like Perplexity and browser-maker Opera. However, two products that have found some vocal fan-following with Gemini and ChatGPT have finally landed on the Copilot platform. 

Read more
Rivian set to unlock unmapped roads for Gen2 vehicles
rivian unmapped roads gen2 r1t gallery image 0

Rivian fans rejoice! Just a few weeks ago, Rivian rolled out automated, hands-off driving for its second-gen R1 vehicles with a game-changing software update. Yet, the new feature, which is only operational on mapped highways, had left many fans craving for more.
Now the company, which prides itself on listening to - and delivering on - what its customers want, didn’t wait long to signal a ‘map-free’ upgrade will be available later this year.
“One feedback we’ve heard loud and clear is that customers love [Highway Assist] but they want to use it in more places,” James Philbin, Rivian VP of autonomy, said on the podcast RivianTrackr Hangouts. “So that’s something kind of exciting we’re working on, we’re calling it internally ‘Map Free’, that we’re targeting for later this year.”
The lag between the release of Highway Assist (HWA) and Map Free automated driving gives time for the fleet of Rivian vehicles to gather ‘unique events’. These events are used to train Rivian’s offline model in the cloud before data is distilled back to individual vehicles.
As Rivian founder and CEO RJ Scaringe explained in early March, HWA marked the very beginning of an expanding automated-driving feature set, “going from highways to surface roads, to turn-by-turn.”
For now, HWA still requires drivers to keep their eyes on the road. The system will send alerts if you drift too long without paying attention. But stay tuned—eyes-off driving is set for 2026.
It’s also part of what Rivian calls its “Giving you your time back” philosophy, the first of three pillars supporting Rivian’s vision over the next three to five years. Philbin says that philosophy is focused on “meeting drivers where they are”, as opposed to chasing full automation in the way other automakers, such as Tesla’s robotaxi, might be doing.
“We recognize a lot of people buy Rivians to go on these adventures, to have these amazing trips. They want to drive, and we want to let them drive,” Philbin says. “But there’s a lot of other driving that’s very monotonous, very boring, like on the highway. There, giving you your time back is how we can give the best experience.”
This will also eventually lead to the third pillar of Rivian’s vision, which is delivering Level 4, or high-automation vehicles: Those will offer features such as auto park or auto valet, where you can get out of your Rivian at the office, or at the airport, and it goes off and parks itself.
While not promising anything, Philbin says he believes the current Gen 2 hardware and platforms should be able to support these upcoming features.
The second pillar for Rivian is its focus on active safety features, as the EV-maker rewrote its entire autonomous vehicle (AV) system for its Gen2 models. This focus allowed Rivian’s R1T to be the only large truck in North America to get a Top Safety Pick+ from the Insurance Institute for Highway Safety.
“I believe there’s a lot of innovation in the active safety space, in terms of making those features more capable and preventing more accidents,” Philbin says. “Really the goal, the north star goal, would be to have Rivian be one of the safest vehicles on the road, not only for the occupants but also for other road users.”

Read more
Jaguar Land Rover, Nissan hit the brake on shipments to U.S. over tariffs
Range Rover Sport P400e

Jaguar Land Rover (JLR) has announced it will pause shipments of its UK-made cars to the United States this month, while it figures out how to respond to President Donald Trump's 25% tariff on imported cars.

"As we work to address the new trading terms with our business partners, we are taking some short-term actions, including a shipment pause in April, as we develop our mid- to longer-term plans," JLR said in a statement sent to various media.

Read more