Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Why do flocks of birds swoop and swirl together ...

A shape-shifting flock of thousands of starlings, called a murmuration, is amazing to see. As many as 750,000 birds join together in flight. The birds spread out and come together. The flock splits ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) The late Oxford University biologist William D. Hamilton discussed the advantages of ...