Researchers find Apennine brown bears evolved into a smaller, less aggressive animal after centuries of coexistence with ...

Here, we show that experimental evolution of parasite body size over 4 y (approximately 60 generations) leads to reproductive isolation in natural populations of feather lice on birds. When lice are ...

New research reveals ancient humans in southern Africa lived in isolation for nearly 100,000 years. This led to unique genetic traits not seen in modern populations. These findings show human ...