In a battle of mosquitofish against guppies, the native mosquitofish emerge victorious. That's really good for the ecosystem.

Long considered one species, new research shows that Asian and African leopards are more genetically different than polar bears and brown bears.

Human activity doesn't affect all species the same, according to a new global assessment that finds corals are the most affected marine organism on Earth.

If strongly protected, specific areas of the ocean could help solve climate, food, and biodiversity crises around the world.

Researchers propose a "lunar ark" that would store cryogenically frozen seed, spore, sperm, and egg samples from 6.7 million Earth species.

The largest and smallest Caribbean mammals have been the most vulnerable to extinction, a finding that may lead to ways to prevent future biodiversity loss.

A "genetic rescue" involving the mating of different subspecies may offer the best way to save increasingly fragmented tiger populations.

The most diverse bee communities have the lowest levels of viral pathogens. "Promoting diverse bee communities may be a win-win strategy..."

An exceptionally well-preserved skull of the duckbill dinosaur Parasaurolophus solves mysteries of its signature crest and family tree.

Bumble bees in low-quality landscapes with fewer flowers and places for nesting have more diseases and parasites, researchers say.