Discover the evolutionary secrets of some of the world"s most majestic creatures.When Whales Walked follows top scientists on a global adventure as they follow clues from fossil records and change what we thought we knew about the evolution of iconic beasts. This episode looks at the strange a Discover the evolutionary secrets of some of the world"s most majestic creatures.When Whales Walked follows top scientists on a global adventure as they follow clues from fossil records and change what we thought we knew about the evolution of iconic beasts. This episode looks at the strange ancestors of crocodiles, and how the modern bird evolved from feathered dinosaurs.