Massive Crater Discovered Under Greenland Ice

the polar ice sheets. The group, led by researchers from the Centre for GeoGenetics at the Natural History Museum of Denmark, University of Copenhagen, worked for the past three years to verify their discovery, which was initially made in 2015 using NASA data. Their finding is described in a study published on Nov. 14 in the journal Science Advances. The crater is roughly a thousand feet deep and more than 19 miles in diameter, encompassing an area slightly larger than that comprised inside the Capital Beltway around Washington, D.C. Its dimensions place it among the 25 largest impact craters on Earth. The crater formed when an iron meteorite more than half a mile wide smashed into northwest Greenland – but the timing of when the event happened remains a key question and one the researchers want to answer next. The authors put the range between less than 3 million years ago and as recently as less than 13,000 years ago. The resulting depression has since been covered by ice. This narrated video outlines the discovery and includes data visualizations which can be found here: https://svs.gsfc.nasa.gov/4572