In a first, scientists found ancient gene mixing between chimps and bonobos, humankind's closest relatives, showing parallels with Neanderthal mixing in human ancestry.
A hybrid species of all-female fish in the north Pacific Ocean may have survived for an uncharacteristically long period of time by switching mating species.
An Australian sheep was recently retrieved after spending six years in the wild and accumulating a life-threatening amount of wool. Centuries of artificial selection at our hands have turned domesticated animals into dependant creatures,...