Regular Tet Zoo readers will recall the article from March on ratite and tinamou evolution. Ratites, just in case you don't know, are the flightless kiwi, ostriches, rheas, emus and so on, while ...

The mass extinction that killed off dinosaurs might have been what grounded the ancestors of today's large flightless birds like the ostrich. As the Age of Dinosaurs came to an end, some flying birds ...

Fossil evidence supported the explanation that Ratites evolved around 65 million years ago, just as the dinosaurs were dying out. But by then, the continents had already broken apart, upending the ...

Large flightless birds of the southern continents -- African ostriches, Australian emus and cassowaries, South American rheas and the New Zealand kiwi -- do not share a common flightless ancestor as ...

Large flightless birds are scattered across all but one of the world's southern continents. Since Darwin's era, people have wondered: How are they related? Darwin noticed, and he predicted that ...

Watching an ostrich sprint across the plain like a mean two-legged dust mop, you might think a mistake has been made. Surely this isn't one of evolution's prouder moments? But new genetic evidence ...

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

They might be the odd couple of the bird world. Scientists on Thursday identified the closest relative of New Zealand's famed kiwi, a shy chicken-sized flightless bird, as the elephant bird of ...

Across the globe, there are around 40 species of birds that are incapable of flying. For centuries, ornithologists have wondered how and why these species lost their flying skills and developed ...

When Nathan Young asked “What’s the difference between an emu and an ostrich?” Weird Animal Question of the Week decided to explore the whole group to which those birds belong, the flightless ratites.