Greg Bryant, a professor at UCLA, explains his studies on laughter. Using acoustic analysis, he found that real laughter was more emotional, closer to animals, and fake laughter was closer to speech.
Scientists have found that a hormone associated with long life also seems to make people smarter. The gene strengthens the connections between brain cells, a process that's essential for learning.
Westerners tend to be more individualistic than Easterners. Did our ancestors plant these cultural differences hundreds of years when they chose which grains to grow?
Is the largest creature on Earth a tree or a tree strangler? Both are candidates. Both are plausible. Neither is a blue whale.
Baby polar bears slurp milk that's 27 percent fat, and adults dine on seal blubber. Scientists think bears' adaptation to a high-fat diet might lead to better ways to treat human obesity.