Different species often form due to geographic barriers such as mountain ranges or rivers, which separate populations of the same species until they have become so different that they can no longer ...

No, chimpanzees and other great apes cannot breed with monkeys. Even though we often think of primates – the order of mammals that includes great apes such as chimps and ourselves, gibbons, monkeys ...

Some female birds, reptiles and other animals can make a baby on their own. But for mammals like us, eggs and sperm need each other. Parthenogenesis could be the future for this California condor ...