Ostriches, emus, rheas and other large, flightless birds are found on six landmasses separated by oceans, but how they reached such far-apart places without the ability to fly has remained an enduring mystery. One idea was that the ancestors of this group of birds, known as paleognaths, just walked to those locations when most of the planet was harnessed together …
Read More »Huge flightless birds live the world over. Now we know how they got there —and it has to do with a ‘rare’ ancestor
