The ice shelf appears in the middle of the images.

Some time around 1955, a section of the ice shelf broke off.

They were on an ice shelf a few hundred yards down.

We headed out a few miles onto the ice shelf.

The finding may also have some implications for the future of the ice shelf itself.

A 1986 survey of Canadian ice shelves found that 48 km2.

Canada has lost approximately 90% of its ice shelves in the last hundred years.

The finding indicates that this part of the ice shelf had been open water at least once before.

"That means we're now on a floating ice shelf which could break apart at any moment!"

This water is just warm enough to cause significant melting at the bottom of the ice shelves.