Reference Dogs can only distinguish between blue and yellow hues. Here's how red and green tomatoes look to them.
Reference How can red mean love AND war? Why is purple royal? Life's Little Mysteries answers these questions and more.
Reference The Republicans used to favor big government, while Democrats were committed to curbing federal power. So how did the parties switch stances?
In this vast and lonely universe, are Earthlings just desperate for next door neighbors to play with?
Droughts are one of the most damaging types of weather-related phenomena, but classifying them is difficult.
The more we learn about the universe, the more questions seem to arise. Our picks for the biggest open questions remaining in physics.
Straight men are programmed to love breasts so that they'll play with them during sex, which triggers the woman's maternal bonding circuitry.
Next time you break a limb or come down with scurvy, be thankful it's not something much, much worse.
Doping is already thought to be widespread among elite athletes, but if doping were legal, many athletes would probably take it to extremes.
A photo series showing a lion being gentle with a baby antelope has been misrepresented as an example of interspecies friendship.
NASA's Voyager 1 spacecraft has met two criteria indicating it has left the solar system, the first manmade object to do so.
Scientists have discovered why the world's most famous food pairings, from wine and cheese to meat sandwiches and a pickle, combine an astringent food with a fatty food.
Excessive Internet use has many of the symptoms of drug addiction. It may soon be classified as a legitimate mental illness.
A daredevil will skydive to Earth from 23 miles up on Oct. 8, achieving supersonic speeds during his freefall. Experts explain the physics of this unprecedented act.
Blind people seem to use sound and touch to generate detailed 3D images of their surroundings. But without colors, what are these images like?
Fall or is it autumn? hasn't always been considered a season, and its relatively new seasonal status is reflected in the ambivalence over its name.
Intellectual disability or mental retardation usually results from random new mutations that arise, not by the inheritance of faulty recessive genes.
There are compelling arguments for and against the authenticity of this important manuscript. The answer may - or may not - come down to chemistry.