英语听力：探索发现 2013-01-11 冰河新新州 Ice Age Oasis—13（在线收听）

 But despite their name, the mighty Everglades did not exist during the ice age. So what did pre-historic Florida look like? There is one place in northern Florida that has revealed more ice age secrets than almost anywhere else, the dark slow-moving waters of the Aucilla River. Here ideal conditions for fossilization created a hidden store of ice age evidence. Unlike in the crystal clear spring waters, these clues were never unveiled for all to see. But the Aucilla has now been studied intensively for more than 20 years.