NASA's latest robot has already found frozen water and is looking for more signs that the Red Planet could support life.

Even so-called "mild" head injuries turn out to be anything but.

A pair of mammoth skeletons is found locked together by their tusks. What happened?

Once scorned for his ideas about how cancer grows, the late Judah Folkman is now hailed as a visionary.

In this excerpt from a 2002 commencement address at Oberlin College, the late cancer researcher Judah Folkman describes how he learned to think outside the box when he was in high school. Listen in.

A century after falling out of favor among doctors, medicinal leeches are back in hospitals, sucking away on patients' wounds.

Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there?

Three separate teams overcome a biomedical hurdle -- creating stem cells without the use of human embryos.

Meet a marine biologist and explorer who has engineered new ways to spy on deep-sea creatures.

Clues to the origins of human language are turning up in the brains of birds.

Behind the dazzling display of the aurora borealis are space storms that could turn the lights off here on Earth.

A former tennis prodigy aims to create advanced prosthetic limbs controlled by human thought.

Can we engineer bridges that tell us what's wrong with them before it's too late?

In this audio feature, engineer Michael Todd explains how new sensing technologies may help detect structural problems within bridges before they become dangerous.

Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope.

Our most distant primate ancestors, which took the stage shortly after the dinosaurs left it, were tree-dwellers the size of mice.

He jumped the fence from Mexico to work as a farmhand and ended up a leading brain surgeon.

A relatively benign bug becomes a highly lethal pathogen, known to U.S. soldiers as Iraqibacter.

In this video dispatch, learn why George Church of Harvard Medical School hopes to recruit 100,000 people and sequence all of their DNA.

Join host Neil deGrasse Tyson for a fantastic voyage through Earth's molten core -- without getting burned.