A newly discovered batch of well-preserved dinosaur bones, petrified trees and even freshwater clams in southeastern Utah may provide fresh clues about life in the region some 150 million years ago. The Bureau of Land Management announced the find Monday, calling the quarry near Hanksville "a major dinosaur fossil discovery." Several weeks of excavation have revealed at least four long-necked sauropods, two carnivorous dinosaurs and possibly a stegosaurus, according to the BLM. Nearby, there are also animal burrows and petrified tree trunks six feet in diameter. It doesn't contain any new species - at least not yet - but offers...