Adam Cole

A clever photography trick allows you to see the invisible: the rising heat from a lighter, the turbulence around airplane wings, the plume of a sneeze ... and even sound waves.

This winter's unexpected arctic bird invasion has given owl researchers a rare opportunity. They're fitting a few of the errant owls with GPS backpacks to track their return to the Arctic.

Millions of basketball fans will fill out NCAA tournament brackets this week and try to correctly predict the outcomes of every game. The chances of succeeding are about 1 in 150 quintillion. A group of computer scientists are trying to beat those odds by writing programs that learn to pick winners.

A handful of AIDS cases were first recognized in the U.S. at the beginning of the 1980s. By 1990, there was a pandemic. In 1997, more than 3 million people became newly infected with HIV. A multimedia chart lets you track the cases by country over time.

Researchers have found that a few lessons in a meditation technique adapted from Tibetan Buddhism can change the way people perceive pain.