Some scientists say the worst mass extinction since the dinosaur demise is underway, and humans are at least partly to blame. Amid the doom, some tales of hope.
Researchers have discovered the molecular signals that spark the killer instinct in cells that form your body's firt line of defense.
Researchers are exploring everything from hormone implants to underarm gels and removable plugs to put the birth control onus on men.
Walking upside-down requires a careful balance of adhesion and weight, and specialized trekking tools to combat the constant tug of gravity.
A new study of ancient organisms indicates they survived the coldest, harshest conditions nature ever created.
Twenty-five years after the discovery of the first confirmed case of AIDS, LiveScience takes you inside viruses to see how they infect.
Female cichlid fish are drab. But they prefer flashy, colorful mates. Evolution has therefore produced a bright red and deep blue version.
Their party-crashing feats show just how productive and important they are and hint at why they thrive in just about any habitat.
Some bottlenecks are preventable, says physicist Craig Davis. How you can do your part, and how automated cruise control might one day help.
A stockpile of thousands of years of microbesâ€™ table scraps give earth its color. So why is it sometimes not brown.