Adam Cole

When it comes to weaning, humans are weird.

Our closest relatives, chimpanzees and gorillas, breast-feed their offspring for several years. Some baby orangutans nurse until they are 7 years old.

But modern humans wean much earlier. In preindustrial societies, babies stop nursing after about two years. Which raises the question: ...

Scientists have discovered water that has been trapped in rock for more than a billion years. The water might contain microbes that evolved independently from the surface world, and it's a finding that gives new hope to the search for life on other planets.

The water samples came from holes ...

Basketball fans have one more day to fill out their March Madness brackets. They'll need to predict not just the champions and their route to victory, but also the paths of all the losers. It's not easy. In fact, no person or computer has yet been able to do ...

Like many humans, most young animals approaching adulthood tend to leave their parents and siblings and strike out on their own. They want to avoid competing with relatives. They want to avoid incest. In certain species, they want to avoid nagging.

But a new paper published in Thursday's Science ...

For more than a century, neurons have been the superstars of the brain. Their less glamorous partners, glial cells, can't send electric signals, and so they've been mostly ignored.

Now scientists have injected some human glial cells into the brains of newborn mice. When the mice grew up, they ...

Our short Argentine Invasion traces the relentless and bloody march of a band of ant warriors whose empire now wraps around the planet (they've been found on every continent except ...

No word yet on whether memorizing The Cat in the Hat will now become a requirement for medical school admission.

The U.N. says today symbolically marks the moment when the world's population reaches 7 billion. A little more than two centuries ago, the global population was 1 billion. How did it ...