In this Jan. 13, 2021, file photo a wind turbine is silhouetted against the rising sun Wednesday, Jan. 13, 2021, near Spearville, Kan.

Killer whales that feast on seals and hunt in small packs are thriving while their widely beloved siblings are dying out.

With demand for COVID-19 vaccines outpacing the world’s supplies, a frustrated public and policymakers want to know: How can we get more? A lot more. Right away.

The world’s vital insect kingdom is undergoing “death by a thousand cuts,” the world’s top bug experts said.

Identical twins are not exactly genetically the same, new research shows.

America’s rivers are changing color — and people are behind many of the shifts, a new study said.

The COVID-19 pandemic has helped revive the autopsy.

Gorillas are highly sociable animals – up to a point. A crowded mountain can make silverbacks more violent, scientists say.

Gray wolves rebounded in parts of the American West with remarkable speed following their reintroduction 25 years ago.

Tasmanian devils, the carnivorous marsupials whose feisty, frenzied eating habits won the animals cartoon fame, have returned to mainland Australia for the first time in some 3,000 years.

Every year, as many as 400 million people are infected with life-threatening diseases by the Aedes aegypti mosquito. It wasn’t always so dangerous.

Trees now cover most of the exclusion zone, and climate change is making them more likely to burn.