LOST WORLDS FOUND: Sugar cubes of buried soil reveal how ecosystems warmed after the last ice age
If time travel were possible, big game hunters would be clamoring to visit the Yukon during the last ice age. About 30,000 years ago, mammoths with 3-meter tusks and shaggy coats nosed about with bison, woolly rhinos, muskoxen, and small horses, while lions, short-faced bears, and scimitartoothed cats lurked in...