A three-year-old boy died after allegedly eating the highly toxic pesticide carbofuran, outlawed in 2008 in Kenya after farmers used it to poison lions and other wildlife.

By tweaking a single gene, scientists have made Hobbie-J the smartest rat in the world. The technique might make humans smarter too—maybe too smart.

Some unusual ingredients, from heroin and cinnamon to rocket fuel and birth control drugs, are lurking in the world's freshwater supplies, scientists report.

With help from Michelle Obama, Sesame Street kicked off its Google-hyped 40th-anniversary season Tuesday—the first in new a two-year environmental-education effort. "Scary" issues like global warming, though, are off-limits.

With help from Michelle Obama, Sesame Street kicks off its Google-hyped 40th-anniversary season tomorrow—the first in new a two-year environmental-education effort. "Scary" issues like global warming, though, are off-limits.

Newborn babies start learning language in the womb—and are born with accent-like intonations, a new study of crying babies says.

Hyper-real animation—think movies like The Polar Express or Beowulf—can get too realistic for comfort, psychologists say. And according to a new study, monkeys might agree.

A new robot sweats, moans, and exhibits symptoms of the H1N1 swine flu virus. Unveiled Thursday in Japan, the robot is to help train health care workers. Video.

Police in Australia say a blood-engorged leech, through DNA testing, led them to a man responsible for the robbery eight years ago of a 71-year-old woman.Video

Using search engines may help stave off dementia and memory loss among older people, according to a new report. During the study, key areas of Web newbies' brains were activated after regular Googling.

It's only a matter of time before swine flu jumps to U.S. pigs, experts say. Scientists say H1N1 could strengthen while in the animals, while farmers—already battered by the perception that pork is unsafe—fear even worse sales.

People with sharper senses of smell really have a nose for relating to others' emotions, new research suggests.

Today's announcement that U.S. swine flu deaths among children are "shooting up" is generating headlines. Meanwhile swine flu is infecting another group up to five times more often than the general public, advocates say.

Giant, jelly-like sheets of dead and living organic matter, known as marine mucilages, are spreading throughout the Mediterranean. The blobs may smother marine life and carry diseases dangerous to humans.

Since 1901, the world's most prestigious award has recognized a range of pioneers and luminaries, from Albert Einstein to Al Gore.Video