The dams were built in the early 1900s and they were built to create power. We saw the fish populations decline to where we weren't sure how long we were going to be able to feed our people.

The ancestors of the first whales lived on land, but about 55 million years ago early whales were spending more time in the water. They gained adaptations such as denser bones that acted as a kind ...

Tiktaalik first became known to humans in 2004, ... Other land-curious fish or early tetrapods were no less ridiculous-looking. Before Tiktaalik, flat-skulled Panderichthys swam in the shallows.