Lips are made of very sensitive tissue and, because we use our mouths constantly, are over-exposed to harsh environmental factors.
Birds use infrasounds to sense storms long before dark clouds gather.
Astronomers discover wind patterns on Titan that recur over tens of thousands of years.
There are some 17,000 grizzly bears throughout Europe, compared to only around 1800 in the contiguous United States.
When you use your imagination, you activate the same regions of your visual cortex as those used to see the outer world.
Take a tour of a plant cell to help you synthesize how photosynthesis works.
When frozen in water, fish remain in a state of suspended animation until spring melts the ice away.
As babies grow from six months to nine months, they lose their ability to distinguish between animal faces. Here's why:
Bacteriophages turn the table on bacteria and the hunter becomes the hunted.
Cats shed their fur in response to increased sunlight; most indoor cats, however, lose track of seasonal changes and therefore shed year around.