A group of orcas swims together in the North Atlantic near Norway. The whales stay close as they move through the ocean.

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

Scientists studying stranded pygmy sperm whales have uncovered three previously unknown genotypes of Helicobacter bacteria ...

The warming world has disrupted the timing for plant and animal reproduction, and it's usually bad news for species that depend on each other — like flowers blooming too early and pollinating bees ...