Without passageways to cross dams along the Columbia, salmon are dying. Tribes say the U.S. government isn't cooperating as they try to help the fish recover.
After two decades and $2 billion in spending, the U.S. government's promises to Native tribes to boost fish populations in Oregon and Washington haven't held up.
To learn how antibiotic-resistant bacteria jump from wildlife to livestock to pets to humans, researchers are collecting samples from a wide range of species — including those in the ocean.
