Science Focus
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Despite being flightless, the ostriches of Africa have distant relations in Australia, New Zealand, and South America. All part of a group called the ratites, these birds share some common interests, like laying eggs, running fast, and not flying. But a logical question has bedeviled ornithologists for years: If these birds can't fly, how did they spread across the globe?
The standard explanation is that their common ancestor, also flightless, once roamed all over a southern supercontinent called Gondwana. As the continent split up millions and millions of years ago, populations of this bird were...
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» see original post http://theweek.com/article/index/261957/how-did-flightless-birds-travel-around-the-world
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