Putting ocean-living three-spine stickleback into Alaskan lakes clarifies rapid evolution in the fish and potentially other species.

For early amphibians, moving from water to land and, for some, back to the water left an impression—on the shapes of animals' spines.

Mammals, fish, and insects may have evolved the ability to taste to make sure their food contains the elements they need for healthy growth.

New research on primate alloparenting, or infant care by non-parents, sheds light on the evolution of facial expressions.

Examining the genes of fish shows that researchers might be able to predict the survival chances of animals facing climate change, according to a new study.

Researchers have discovered a new species of saber-toothed cat. The species is one of the largest cats to have ever lived on Earth, researchers say.

New research investigates how some "weird" flatfish like flounder evolved to have two eyes on one side of the head.

Studying mice shows that evolution often works on the same genes in different populations when they're confronted with similar environmental conditions.

New research identifies six diferent types of human screaming. It also shows our brains process joyful screams more efficiently than others.

Flexible diets may save some lemurs from the worst of deforestation, say researchers. Their ability to eat different stuff is in their genes.