Kelly the dolphin gamed her own reward system, then taught the trick to her calf — echoing real tool-use traditions found in ...

Whether you want to treat yourself to a unique piece of jewellery or are looking for a great gift idea, you really can't beat a charm bracelet. Not only do they allow you to express your personal and ...

Some female dolphins have evolved a secret weapon in their sexual arms race with males: vaginas that protect them from fertilisation by unwelcome partners. Penises come in a wide variety of shapes and ...