Large meteorite impact crater discovered under Greenland ice

<p>An international team of researchers, including a NASA glaciologist, has discovered a large meteorite impact crater hiding beneath more than a half-mile of ice in northwest Greenland. The crater — the first of any size found under the Greenland ice sheet — is one of the 25 largest impact craters on Earth, measuring roughly 1,000 feet (304 meters) deep and more than 19 miles (31 kilometers) in diameter, an area slightly larger than that inside Washington’s Capital Beltway.</p><p><span style="color: rgb(191, 191, 191);">(Video source: NASA)</span><br/></p>