Packed with ingenious scientific work and spectacular fossils, Nova's Ice Age Death Trap reveals intimate secrets of the life and death of North America's most exotic and extreme creatures: mastodons, saber tooth cats and camels, giant bison with six-foot horns, and ground sloths as big as elephants. Most tantalizing of all, the excavation, organized by the Denver Museum of Nature and Science, unearths startling and controversial evidence of what may be the earliest humans ever to venture into the untamed wilderness of Ice Age America