Life
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Paleontology
Meet the old wolves, same as the new wolves
The dire wolf, an extinct species preserved in abundance at the La Brea tar pits, seems to have had a social structure similar to that of its modern-day relatives.
By Sid Perkins -
Paleontology
Dinosaurs matured sexually while still growing
Distinctive bone tissue in fossils of several dinosaur species suggests that the ancient reptiles became sexually mature long before they gained adult size.
By Sid Perkins -
Paleontology
Deinonychus’ claws were hookers, not rippers
The meat-eating dinosaur Deinonychus probably used the large, sicklelike claw on its foot to grip and climb large prey, not disembowel it.
By Sid Perkins -
Paleontology
The first matrushka
A newly found fossil preserves one creature inside another that lies nestled inside yet another, a Paleozoic version of the Russian nesting dolls known as matrushkas.
By Sid Perkins -
Animals
Smells Funny: Fish schools break up over body odor
Just an hour's swim in slightly contaminated water can give a fish such bad body odor that its schoolmates shun it.
By Susan Milius -
Paleontology
Digging the Scene: Dinos burrowed, built dens
Dinosaurs remains fossilized within an ancient burrow are the first indisputable evidence that some dinosaurs maintained an underground lifestyle.
By Sid Perkins -
Paleontology
Fossil mystery solved?
Experiments in a Florida swamp show how aquatic creatures can get trapped and preserved in amber, a form of hardened tree sap.
By Sid Perkins -
Animals
Eat a Killer: Snake dines safely with strategic delays
An Australian snake kills dangerous frogs then waits for their defensive chemicals to degrade before eating them.
By Susan Milius -
Animals
Crowcam: Camera on bird’s tail captures bird ingenuity
Video cameras attached to tropical crows record the birds' use of plant stems as tools to dig out food.
By Susan Milius -
Paleontology
Just a quick bite
Saber-toothed cats living in North America around 10,000 years ago had a much weaker bite than modern big cats.
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Animals
Tough-guy bluebirds need a frontier
As western bluebirds recolonize Montana, the most aggressive males move in first, paving the way for milder-mannered dads to take over.
By Susan Milius -
Plants
Stalking the Green Meat Eaters
Pitcher plants in a New England bog hold little ecosystems in their leaves, and also act as indicators of the bog's ecological health.
By Susan Milius