Rodent is faithful, monogamous. Or he strays. Why?

The prairie vole is one of the few monogamous (mostly) mammals. What goes on in the brain that causes the guys to stray? More »

Can a dog learn words?

German dog knows 260 words, learns through fast mapping much like children. Read the story from dog’s point of view! More »

Fruit flies beat their wings 250 times a second. How fast do they sense attitude and adjust their wings to avoid crashing? Ultra fast! More »

If you're small, surface tension matters more than gravity. Now we understand why only large copepods can swim into the air! More »

Herculean taxonomy expedition reveals dual origin of tropical mountain organisms. More »

Reptiles have many ways to set the sex of offspring. Temperature often matters. Could global warming make male “dragons” extinct? More »

Baboons with GPS collars allow scientists to unravel their group decisions -- which starts to look like a democracy! More »

Top 10 New Species list celebrates the living world, proving how many amazing species remain to be discovered. More »

Two billion years ago, we share a common ancestor with this new-found relative. Is this our origin? More »

Tiny, fast explosions inside the bombardier beetle make a toxic spray, then heat and shoot it at the target. Here's how! More »

A changing climate is advancing the arrival of spring. How will this affect the interplay of species in ecosystems? More »

Crystals in skin cells give the panther chameleon a quick color change, and also a built-in cooling system. More »

Two teeth from Kenya identify an ancient hippo and clarify the evolutionary link to whales and dolphins. More »

People order numbers from small on the left to large on the right. So do chickens! Huh? What does this mean? More »

Bar-headed geese hug the terrain as they cross the tallest mountains. Why does that take less energy than flying the shortest route? More »