Adam Cole

For more than a century, neurons have been the superstars of the brain. Now researchers say that when they placed human versions of another type of brain cell into mice brains, the mice grew up to be faster learners. This supports the hypothesis that these glial cells — and not just better-known neurons — play an important role in learning.

Bees and flowers communicate in colors, scents and shapes. Now scientists have discovered that bumblebees can also sense flowers' electric fields. This sixth sense helps them remember and recognize nectar-rich blooms while foraging.

In New Jersey, thousands of discarded Christmas trees have dodged the wood chipper and hit the beach instead. They're being used to jump-start new dunes, but scientists warn that these man-made dunes could be less sturdy than dunes that form naturally.

What killed the dinosaurs? It's history's ultimate murder mystery, and for decades the prime suspect has been a giant asteroid. New data suggest that it struck right before the extinction. But scientists say it still may not tell the full story of what happened to the dinosaurs.

The world is full of data — and that's a problem. We have to find a place to store all those digital photos, tax records and unfinished novels. British scientists have demonstrated a possible solution: They've stored all of Shakespeare's sonnets on several small stretches of DNA.

Scientists have detected milk fat on 7,000-year-old pottery vessels from archaeological sites in Northern Europe. They think it's the earliest evidence of cheese-making, and they argue dairy products gave early farmers an evolutionary edge.

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.