An international team of geoscientists from the United States, Canada and Europe has discovered a large impact crater beneath the Hiawatha Glacier in remote northwest Greenland. A paper on the discovery was published in the journal Science Advances. This is a photo illustration of the airplane during the survey, radar waves and the actual radar image. Image credit: NASA. The Hiawatha impact crater is approximately 19.2 miles (31 km) wide and lies...
