LifeSociable woodpeckers that cooperate have evolved smaller brains It’s long been thought that living in a group leads to bigger brains – including in humans. But a surprising finding in woodpeckers shows this isn’t always the case ¿ìè¶ÌÊÓÆµ
LifeSynchronised swimming seems to make dolphins more optimistic Having a mate to swim with – and mirror their movements – appears to make zoo dolphins feel more positive about their prospects in life ¿ìè¶ÌÊÓÆµ