Futurist Ray Kurzweil explains how the boundary between man and machine is quickly disappearing. PLUS: A gallery of today's most mind-blowing 'bots
Fossils and molecular genetics are just some of the tools researchers have used to answer questions about the history of the human species
Wind, solar, tidal—all are battling for the renewable-energy crown, but what about the six billion highly efficient short-stroke engines in our midst? What about us?
Our ancient quest to create androids is about to destroy the boundary between humans and machines. Futurist, author and inventor Ray Kurzweil explains how
In his book The Most Human Human, Brian Christian looks at the artificial intelligences we've built, and what they say about us
It's a fact of the archaeological record: Modern humans survived and Neanderthals did not. Why? And what does it teach us about our own survival?
Humanity has toppled scores of world records over the past few decades, but how much more progress can we make?
By keeping the people down
A three-foot-tall "hobbit" who lived in Indonesia up to 12,000 years ago is changing the way we think about the human family
Genetic copying is advancing fast, but cloning humans promises to be problematic -- a welcome setback for those who'd like to ban it.
Controversial theorist Aubrey de Grey insists that we are within reach of an engineered cure for aging. Are you prepared to live forever?
We patrolled the halls of academe. We eavesdropped on the research grapevine. We asked scientists: Whose work is just plain brilliant?
When David Hanson set out to build a robotic head, he saw no reason not to make it look just like a human. Then he stumbled into the Uncanny Valley.
Newly discovered human skeletons suggest that people are people, no matter their height
A three-year study will explore the nature of death and consciousness
America is haunted by 100,000 missing persons and 40,000 unidentified sets of remains. Only one lab can truly connect the lost and the dead—and it's revealing the secrets of serial killers in the process
More than 50 of the most dangerous, disgusting, humiliating and just plain bad professions
Everything you need to know about the hottest topic in
medicine, from big-league breakthroughs and new therapies to emerging health risks and the patients willing to take them
Pigs are offering new possibilities for studying Alzheimer's disease