image: Ice radar survey over Hiawatha Glacier by the Alfred Wegener Institute's Polar 6 research aircraft. The radar data reveal both the topography of the impact crater beneath the ice, as well as the layering of the ice itself. This survey revealed that ice older than the Holocene (the past 11,700 years) is heavily disturbed. This material relates to a paper that appeared in the Nov. 14th, 2018, issue of Science Advances, published by AAAS. The paper, by K.H. Kjær at University of Copenhagen in Copenhagen, Denmark, and colleagues was titled, "A large impact crater beneath Hiawatha Glacier in northwest Greenland." view more
Credit: [Credit: Natural History Museum of Denmark, Cryospheric Sciences Lab, NASA Goddard Space Flight Center, Greenbelt, MD, USA]