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Lasers Help Weigh Dinosaurs

Some dinosaurs were really huge. And now we may have a better way to estimate just how heavy these giants were. Researchers have developed a method to weigh dinosaurs, based on laser scans of their skeletons.

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Boa Constrictors Listen to Loosen

True to their name, boa constrictors squeeze the life out of their prey. But how does a boa know it's snuffed out a rat? The snake listens for a heartbeat.

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Body Hair Senses Parasites While Slowing Their Blood Quest

We "naked apes" aren't as hirsute as our primate cousins. We still have an ape-like density of hair follicles--but we sprout out peach fuzz, instead of a thick coat. Those downy hairs may be more than an evolutionary leftover, though

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Monkey Sacrifices Food for Peace and Quiet

What does a bookworm have in common with a black-tufted marmoset? They both like a little quiet. Or so say scientists in the Royal Society journal Biology Letters

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Lousy with Success: Genetics Reveal Fossil Lice as Evolutionary Champions [Slide Show]

For feathered dinosaurs the late Cretaceous period may have been a very itchy time. Lice--the tiny wingless insects that feed on dead skin, and sometimes blood--were just beginning to dig in about 100 million years ago, and the epoch's small furry mammals, early birds and dino-birds would have provided ample food. The louse fossil record is relatively sparse

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