Big canyon entombed beneath Greenland’s ice
Newly discovered chasm helps explain island's lack of subglacial lakes
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2013/08/ew_bamber4HR.jpg?fit=860%2C460&ssl=1)
A 750-kilometer-long canyon (3-D view shown) lies hidden beneath Greenland's ice sheet, a new study reveals. Researchers say a river carved the channel several million years ago, before the island was covered in ice.
J. Bamber/Univ. of Bristol