"They're more elusive — and critically endangered." Researchers stunned after cameras record rare predators in unexpected location: 'Only 73 remain' first appeared on The Cool Down.

By studying salmon bones, scientists have uncovered that for thousands of years, Chinook salmon returned to California rivers at a range of ages. Today, habitat loss, overharvesting and conventional ...

In the Klamath Tribes’ treaty territory, tribal councilors are working to protect a rare blue-green algae known as Mare’s ...

Pinks, the smallest Pacific salmon species, are booming. That's spelled trouble for other fish species struggling for ...