A Moment of Science: Audio

Insect blood is green, and gets its color from the plants it eats.

Rage and aggression are hardwired in our brains as a survival instinct.

All land vertebrates evolved from fish, and a fossil of Acanthostega—part-fish, part-amphibious creature—pinpoints how we made the leap from water to earth.

People like robots that act like humans but only up to a certain point; robots that are convincingly humanoid cause fear and horror.

Spinach may have done the trick for Popeye, but it doesn't add muscle to the rest of us.

The brains of men and women do not differ based on gender.

Like the Roman-god namesake, Mercury is known for its extreme behavior.

The bombardier beetle is aptly named: It fires toxic chemicals at approaching predators that sound like an explosive bomb when released.

Global warming is depleting oxygen in the water, creating and expanding "dead zones" toxic to sea life.

We don't perceive color in our peripheral vision because we have no cones, which sense light frequencies, on the outer edge of our retina.

In a lab study, dogs learned how to match other canines by species.

While steroids enhance muscle growth, they also cause liver damage and 'roid rage.

Moths with high contrast markings like zebra stripes are harder to detect, at least at first, than those with background-matching camouflage.

V2, a special region in the visual cortex, stitches together the visual data from each eye to produce one seamless 3-D image.

After a nine-year expedition, the New Horizon spacecraft finally reached Pluto to see what's at the heart of the exoplanet.