Search Results for: Dinosaurs

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1,961 results

1,961 results for: Dinosaurs

  1. Math

    Whips and Dinosaur Tails

    The loud crack of a deftly flicked bullwhip can certainly command attention. That distinctive noise is a small sonic boom, generated when the whip’s thin, highly flexible tip exceeds the speed of sound. Swinging a leather bullwhip’s thick, rigid handle in an arc gives the whip angular momentum. Sharply reversing the motion’s direction sends a […]

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  2. Paleontology

    Reptile remains fill in fossil record

    The fossil remains of a sphenodontian, an ancient, lizardlike reptile, are helping fill a 120-million-year-old gap between this creature's ancestors and today's tuatara, sole survivors of the once prominent group.

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  3. Paleontology

    Wings Aplenty: Dinosaur species had feathered hind limbs

    A team of Chinese paleontologists has discovered fossils of a small, feathered dinosaur that they say had four wings.

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  4. Paleontology

    Trackway site shows dinosaur on the go

    Scientists say that a sediment-filled, bathtub-shape depression found at one of North America's most significant dinosaur trackway sites is the first recognized evidence of urination in dinosaurs.

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  5. Paleontology

    Dinosaurs, party of six, meat eating

    The bones of six carnivorous dinosaurs discovered in a fossil bed in Patagonia may indicate that big, meat-eating dinosaurs were social creatures.

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  6. Humans

    Science News of the Year 2004

    A review of important scientific achievements reported in Science News during the year 2004.

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  7. Earth

    Pieces of a Pulverizer? Sediment fragments may be from killer space rock

    Scientists sifting sediments laid down just after Earth's most devastating mass extinction 250 million years ago may have found minuscule fragments of the extraterrestrial object that caused the catastrophe.

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  8. 19233

    Good grief, I can’t believe this is a surprise that dinosaurs were cannibals. Frogs eat frogs. Rabbits eat their young. We can go on for quite a time enumerating mammals (including people), reptiles, birds, and insects that eat their own. The surprise is finding ones that aren’t cannibals. Barbara BennettPreston, Md.

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  9. Earth

    Early web-footed bird made impression

    Researchers have discovered the fossil tracks of an otherwise unknown bird in 110-million-year-old sediments, which pushes back evidence of web-footed birds by at least 25 million years.

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  10. Paleontology

    Overlooked fossil spread first feathers

    A new look at a fossil that had been lying in a drawer in Moscow for nearly 30 years has uncovered the oldest known feathered animal.

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  11. Paleontology

    Was T. rex just a big freeloader?

    A new study suggests that an ecosystem like today’s African savanna could provide sufficient carrion to nourish a scavenger the size of a Tyrannosaurus rex.

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  12. Paleontology

    Forged fossil is a fish-eating fowl

    Detailed analyses of Archaeoraptor, a forged fossil once thought to be a missing link between dinosaurs and birds, reveal that the majority of that fake comes from an ancient, fish-eating bird.

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