In Oregon, a cluster of lakes is drying up — with dire impacts for the millions of migrating birds that survive off them.
For over a century, federal law has split Native American land holdings into tiny pieces. A settlement unites some of the splinters, but at a steep cost.
The federal agency has been researching nonlethal means to protect livestock for decades. So why is it still killing so many carnivores?
Scientific inquiry is a process of constant revision. And revision is where the most intriguing discoveries happen.
Its defenders won a long fight over water with Los Angeles. Now, drought is raising new questions about its future.