Antarctic hole almost the size of Manhattan discovered

A massive hole two-thirds the size of Manhattan is growing at the bottom of an Antarctic glacier and has NASA scientists disturbed about the potential for rapid melting and decay.
The huge cavity – which is approximately 1,000 feet tall, about as tall as New York City's Chrysler Building – is growing at the bottom of the Thwaites Glacier and is large enough to have once contained 14 billion tons of ice, according to NASA. Most of that ice melted over the last three years.
"We have suspected for years that Thwaites was not tightly attached to the bedrock beneath it," Eric Rignot of the University of California, Irvine, and NASA's Jet Propulsion Laboratory in Pasadena, California, said in a NASA post. Rignot is a co-author of the new study, which was published in Science Advances. "Thanks to a new generation of satellites, we can finally see the detail," he said.