Feathered dinosaurs, walking whales, killer kangaroos—these are but a few of the fantastic creatures that roamed the
planet before the dawn of humans. For more than 200 years, scientists have studied fossil remnants of eons past,
painstakingly piecing together the history of life on earth. Through their efforts, not only have long-extinct beasts come
to light, but the origins of many modern animals have been revealed.