Race of Life - Survival of the Fittest9

There are many fine examples of evolutionary history in the natural world. Animals evolve through small mutations to better compete for resources. Crocodiles, over 200 million years old, survived extinction due to their adaptability?slow metabolism, 4-chamber heart, and lungs that allow 2-hour dives. Sharks retained successful traits from ancient ancestors, evolving gradually. Whales transitioned from land to sea, developing echolocation, blubber, modified lungs, and enhanced hearing for survival.