Colossal ancient icebergs left grooves on the bottom of the North Sea
Tabular icebergs are breaking away from the ice shelves of Antarctica James Kirkham City-sized icebergs once drifted past the coast of Britain when ice sheets covering much of northern Europe were in rapid retreat about 18,000 to 20,000 years ago. James Kirkham at the British Antarctic Survey and his colleagues have found the preserved scour…
