Liz Entman

Stone tools, cooked animal and plant remains, and fire pits from a site in southern Chile suggest the earliest known Americans—a nomadic people adapted to a cold, ice-age environment—were established deep in South America more than 15,000 years ago.

It may be possible to selectively manipulate our ability to learn by sending a mild electrical current to the brain, a new study suggests.

Stone tools, cooked animal and plant remains, and fire pits from a site in southern Chile suggest the earliest known Americans—a nomadic people adapted to a cold, ice-age environment—were established deep in South America more than 15,000 years ago.

It may be possible to selectively manipulate our ability to learn by sending a mild electrical current to the brain, a new study suggests.