1. Paleontology

    No Olympian: Analysis hints T. rex ran slowly, if at all

    Tyrannosaurus rex, a bipedal meat eater considered by many to be the most fearsome dinosaur of its day, may not have been the swift Jeep-chaser portrayed by Hollywood.

  2. Paleontology

    Dinosaur tracks show walking and running

    A single trail of dinosaur footprints found in a British limestone quarry preserves a record of two different walking styles in the same animal, a tantalizing clue that some types of lumbering, bipedal dinosaurs could also run if the need arose.

  3. Paleontology

    Turn Your Head and Roar

    The analysis of fossils that preserve evidence of diseases that appear to be similar or identical to afflictions that strike modern animals, including humans, could help scientists better grasp the causes and courses of today's ailments.

  4. Paleontology

    New fossils threaten an extinction theory

    Recent discoveries of long-dead marine invertebrates call into question the occurrence of a catastrophic global extinction during the Late Devonian period, between 385 and 375 million years ago.

  5. Paleontology

    Fossils Indicate. . .Wow, What a Croc!

    Newly discovered fossils of an ancient cousin of modern crocodiles suggest that adults of the species may have been dinosaur-munching behemoths that grew to the length of a school bus and weighed as much as 8 metric tons.

  6. Paleontology

    Even flossing wouldn’t have helped

    Small particles trapped in minuscule cracks or pits in the teeth of plant-eating dinosaurs could give scientists a way to identify the types of greenery the ancient herbivores were munching.

  7. Paleontology

    CT scan unscrambles rare, ancient egg

    A tangled heap of bones and bone fragments in the bottom of an unhatched elephant bird egg may soon be reassembled into a model of the long-dead embryo, thanks to high technology—and scientists won't even have to crack open the egg to do it.

  8. Paleontology

    How did Triceratops grow its horns?

    Newly discovered fossil skulls of juvenile Triceratops may help reveal how the dinosaurs grew their three trademark horns.

  9. Paleontology

    Fossils found under tons of Kitty Litter

    Excavations at North America's largest Kitter Litter mine have yielded fossils of ancient aquatic reptiles, as well as evidence of a tsunami generated by the extraterrestrial impact that killed off the dinosaurs about 65 million years ago.

  10. Paleontology

    Lemurs reveal clues to ancient Asian roots

    A diminutive lemur species inhabited what is now central Pakistan about 30 million years ago, a new fossil find suggests.

  11. Paleontology

    Large shadows fell on Cretaceous landscape

    Paleontologists have unearthed the remains of what they believe could be the largest flying creature yet discovered—a 12-meter-wingspan pterosaur.

  12. Paleontology

    New Fossils Resolve Whale’s Origin

    The first discovery of early whale fossils with key ankle bones intact provides compelling paleontological evidence that whales are closely related to many living ungulates, a relationship already supported by molecular data.