Scientists find 2,000 pound rodent - luckily it's a fossil
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Scientists in Uruguay have found the fossil remains of a 2,000 pound (1,000 kg) rodent that lived 2 million to 4 million years ago -- the largest rodent ever found.
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A new fossil of a juvenile dinosaur that lived 140 million years ago is shedding light on how the ancient reptiles grew from youngsters to enormous adults.
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By John Noble Wilford  Scientists have discovered an extinct animal the size of a small squirrel that lived in China at least 125 million years ago and soared among the trees.
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Two fossil finds in China suggest that prehistoric mammals were bigger and badder than previously thought. At least one even ate dinosaurs for dinner.
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Two  reptile-like animals living 290 million years ago are the oldest creatures to have  their footprints positively identified after a fortuitous discovery  allowed scientists to match fossils to preserved trackways.
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A fossil of a gliding animal shows that mammals experimented with flight around when birds first took to the skies.
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By Rhona Ganguly; Emma Pinch  Britain's most endangered mammal has been discovered thriving in many of Birmingham's urban watercourses.
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The extinction of the dinosaurs 65 million years ago can be traced to a collision between two monster rocks in the asteroid belt nearly 100 million years earlier, scientists report on Wednesday.
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Scientists have found a 16-foot fossil of a new species of fish-like lizard that swam the seas 160 million years ago when dinosaurs ruled on land.
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Fossils of a 56-million-year-old mouse-size animal discovered in Wyoming could redraw humans' family tree, scientists say.
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New analysis of bones from an infamous dinosaur long believed to have eaten its own young show that the animal may have been given an undeserved reputation.
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Fossil hunters on the Isle of Wight have unearthed bones belonging to the biggest dinosaur ever found in the UK.
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Scientists have found the remains of a creature that may be the last common ancestor of modern great apes and humans.
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Remains of a dinosaur the size of a double-decker bus have been recognised as belonging to a new species.
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An international team of scientists says it was at Gibraltar 28,000 years ago, some 2,000 years more recently than previously thought.
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A team of scientists says it was at Gibraltar 28,000 years ago, 2,000 years more recently than previously thought.
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Two newly discovered fossils show that a few early mammals were as large as a dog and spunky enough to devour juvenile dinosaurs.