Alexandria, VA - Saber-tooth tigers, dire wolves and woolly mammoths conjure up images of a past when large beasts struggled against the elements, each other, and even against humans for survival. Thousands of these creatures met their demise in the muck of the La Brea tar pits in Los Angeles, where they slowly sank into the tar and were fossilized. Now, scientists are using traces from hungry, bone-eating insects on these fossils to investigate how long it took for the giant beasts to be swallowed up by the sticky, oozy substance.