To help the ailing U.S. fishing industry, scientists are trying to train fish to respond to underwater sound, making them easier to catch.

A natural change in Atlantic Ocean circulation may temporarily mask the effects of global warming over the next ten years, a new study says.

The widespread release of trout modified to be sterile has been given the go-ahead in England and Wales to give anglers sport while boosting the fortunes of native fish.

More than 500 seismic events have rocked Reno, Nevada, in the past week alone, sending scientists scrambling to understand whether the quakes portend a Big One.

After weeks of combing remote rivers for giant freshwater stingrays, biologist Zeb Hogan finally found one—near a busy city. Then the ray gave birth.

A U.S. federal judge has ordered the Interior Department to decide within 16 days whether polar bears should be listed as a threatened species because of global warming.

Fourteen-foot-long rays—perhaps the largest freshwater fish—are thriving not far from Bangkok. But overfishing may still threaten the giants.

A limited range and specialist diet mean that the Arctic porpoise may be slightly more sensitive to habitat changes linked to global warming, a new report says.

The biggest squid ever caught has begun defrosting in a huge tank. Already it's yielding clues to the species' behavior and giant size, scientists say.

A pink-flowering mint and a 5-foot-tall (1.5-meter-tall) herb, both last seen in the 1800s, have "reappeared" in far northern Australia, experts say.

Arctic precipitation has risen more dramatically in the past 50 years than predicted, so estimates of future change "may underestimate what's coming down the pipeline," researchers say.

See a noxious volcano blazing, a steaming sacrifice, uncanny underwater robots, Europe's biggest waterfall turned blue, and more.

Earth's seas have become much stormier over the past three decades, according to analyses of faint tremors caused by ocean waves.

Insect infestations are turning forests in British Columbia into net carbon sources, according to new research that may force researchers to revise climate change models.

Earth's high-altitude winds may be changing due to global warming, possibly making it easier for more powerful storms to form, a new study says.