Twenty years ago, scholar W. D. Williams predicted the loss of salt lakes around the world.

Trees get all the credit. But for biodiversity, look down, too.

In the late 1800s, electric boats were a promising new technology. They are now enjoying a revival.

They may look like random puddles, but some states are building million-dollar tunnels to direct wildlife to these seasonal refuges.

The southern resident killer whales of the northeast Pacific are in trouble. As habitats and food dwindle, they increasingly miscarry and lose their babies.

A relatively small number of people are required to destroy and ecosystem