Scientists discover long-lost giant rivers that flowed across Antarctica up to 80 million years ago

Ancient flat landscapes, preserved under the Antarctic Ice Sheet for 30 million years, have been discovered along a 2,175-mile stretch of East Antarctica's coast. Carved by rivers 80-34 million years ago, these features could help predict future ice loss and sea level rise. The East Antarctic Ice Sheet's complete melting could raise global sea levels by over 160 feet, but slow ice flow above these flat surfaces may be regulating ice loss.