Biology
The Evolution of Flightlessness in Island-Dwelling Bird Species
Quick fact
The dodo, a flightless bird of Mauritius, evolved from a flying pigeon ancestor and lost the ability to fly because it had no natural predators on the island, only to go extinct within a century of human arrival.
Why this is interesting
Imagine a bird that has completely given up flying, even though its ancestors once soared across the sky. Why would evolution ever give up the power of flight?