While steroids enhance muscle growth, they also cause liver damage and 'roid rage.
In a lab study, dogs learned how to match other canines by species.
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.
Global warming is depleting oxygen in the water, creating and expanding "dead zones" toxic to sea life.
The bombardier beetle is aptly named: It fires toxic chemicals that, when released, sound like a bomb detonating.
Like its Roman-god namesake, Mercury is known for extreme behavior.
The brains of men and women do not differ based on gender.
Spinach may have done the trick for Popeye, but it doesn't add muscle to the rest of us.
People like robots that act like humans but only up to a certain point.
All land vertebrates evolved from fish, and Acanthostega—the fossil of a part-fish, part-amphibious creature—pinpoints how we made the leap from water to earth.
Rage and aggression are hardwired in our brains as a survival instinct.
Insect blood is green, and gets its color from the plants it eats.
Hypnotics are pills that are primarily used to induce sleep.
Scientists confirm that sharks navigate long distances using their sniffers.
Everything has a weak magnetic pull, which when exposed to a permanent magnet, can be made to levitate.
Astronauts cannot use conventional pens and pencils in outerspace. Here's why:
Fact or myth: Drinking soda pop causes tooth decay?
Did you know that frogs only eat flies that are in motion?
Suppressed thoughts often come alive in dreams, because our mental control centers doze while we do.