This three-part series illuminates unique and bizarre evolutionary journeys that have brought forth some of the world’s most impressive animals. We unearth a 50-million-year-old mystery mammal, discover the missing link between the velociraptor and modern day birds, and find out if a new bear species could be about to evolve before our very eyes.br br The Whale With Legs - 50 million years ago a hungry land animal sought out a new source of food in the water, starting a spectacular evolutionary journey so that today it looks like a fish.