claim: The last time the planet was even four degrees warmer, Peter Brannen points out in The Ends of the World, his new history of the planet’s major extinction events, the oceans were hundreds of feet higher.
evidence: The elevation of the land surface varies from the low point of −418 m ( −1,371 ft ) at the Dead Sea, to a maximum altitude of 8,848 m ( 29,029 ft ) at the top of Mount Everest.