Biological Evolution: Unity and Diversity

  1. Fossils

    Newly dated footprints: Oldest human tracks?

    These footprints, found nearly a half-century ago, may be almost four times older than first thought, scientists now report.

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  2. Fossils

    Mega-bird!

    What may have been the bird world’s biggest flier ever had wings so long, they would have had trouble flapping fast enough to keep it aloft in tough winds. But this behemoth would have been able to soar both far and fast.

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  3. Fossils

    This dino-bird is super-feathered

    This late-Jurassic dino was also a bird. Its ample coat of feathers emerged before any need for flight.

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  4. Archaeology

    Neandertal ancestor?

    Fossils found in a Spanish cave have features that are a combination of Neandertals and other species. The mix suggests Neandertal roots go back even farther than scientists had suspected.

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  5. Fossils

    Hot-blooded dinos? Try lukewarm

    New study finds these reptiles may have had an internal furnace that sort of resembled some sharks. It appeared to run neither hot nor cold.

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  6. Fossils

    These prehistoric fliers likely nested together

    Fossils in nest of newfound pterosaur species suggest these animals were part of a social network — and may even have lived communally.

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  7. Animals

    Even penguins get the flu

    Scientists have just identified ‘live’ bird flu virus in Antarctic penguins. But the infections may not be novel. There are some signs these germs have been infecting local wildlife for up to 80 years.

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  8. Animals

    Surprise! Fossils in a flash

    By studying how dead tissues decay — or turn to ‘instant’ fossils — scientists are gleaning helpful clues to what ancient life looked like.

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  9. Animals

    When a species can’t stand the heat

    When temperatures rise, New Zealand’s tuatara produce more males. With global warming, that could leave the ancient reptile species with too few females to avoid going extinct.

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  10. Animals

    Explainer: How invasive species ratted out the tuatara

    The introduction of rats to New Zealand led to huge population losses of the ancient tuatara. These uncommon reptiles vanished from the mainland. This left isolated populations to survive on several dozen isolated islands.

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  11. Fossils

    Scary ‘chicken’ roamed Earth with T. rex

    Scientists have just pieced together evidence of a weird new dinosaur that sported sharp claws, feathers and a beak. And it just may have been one of the last dinos to roam Earth about 67 million years ago.

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  12. Fossils

    Reviving dinosaurs

    With the help of computers, researchers are getting a pretty good idea of how these ancient creatures moved, walked and ate.

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