A remarkable collection of fossils has been unearthed in Florida after a sinkhole swallowed a group ... expert reveals Mapped: World's Largest Iceberg Runs Aground Off South Georgia 10 Things ...
Florida, rich in limestone ... known as the Xiaozhai Heavenly Pit. This sinkhole, thought to be the largest in the world, measures around 537 meters (1,762 feet) wide and 662 meters (2,172 ...