A huge flood triggered by the rapid draining of a lake beneath the Greenland ice sheet occurred with such force that it ...

A huge flood triggered by the rapid draining of a lake beneath the Greenland ice sheet occurred with such force that it fractured the ice above and burst out across its surface. This phenomenon, ...

By comparison, Nekrasova is a free diver -- which means she held her breath for the duration of the swim at close to 32 degrees Fahrenheit, under a sheet of ice.