An engineer describes the next-generation surveillance sensor for UAVs, called ARGUS.

The X-47B prototype can land on a flight deck without input from a pilot.

Virtual autopsies paint remarkably informative pictures of a body's post-mortem condition. Watch Dr. Anders Persson and his team get under the virtual skin of a victim in order to uncover more information about his death.

The world’s first industrial process likely began with the Neanderthals. In this video, watch as NOVA reenacts the Neanderthal technique of pitch extraction through a complex called dry distillation.

Until recently, scientists have encountered scant evidence of Neanderthal ritual or religious practice. A new discovery, though, suggests that Neanderthals—much like today’s bear hunters—ceremoniously cut off panther paws and kept them as trophies.

"Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. Produced in extensive consultation with NASA scientists, NOVA takes data from earth-observing satellites and transforms it into dazzling visual sequences, each one exposing the intricate and surprising web of forces that sustains life on earth.

Volcanoes can come in many shapes and sizes. PRODUCTION CREDITS Produced, animated, and edited by Anna Rothschild Original Footage ©WGBH Educational Foundation For a full list of credits, see http://www.pbs.org/wgbh/nova/earth/meet-volcanoes.html

Thrihnukagigur crater is the only place on Earth where the anatomy of a volcano can be studied from the inside. When geologists journeyed into its heart, they discovered that a network of fissures links together distant volcanoes.

Expert investigators reexamine one of the greatest murder mysteries of all time.

A team of archaeologists, engineers, woodworkers, and horse trainers join forces to build and test two highly accurate replicas of Egyptian royal chariots. They discover astonishingly advanced features, including spoked wheels, springs, shock absorbers, anti-roll bars, and even a convex-shaped rear mirror, leading one of them to compare the level of design to the engineering standards of 1930's.

Meet a new breed of flying robots, from tiny swarming vehicles to giant unmanned planes.

Over 60,000 years ago, the first modern humans—people physically identical to us today—left their African homeland and entered Europe, then a bleak and inhospitable continent in the grip of the Ice Age. But when they arrived, they were not alone: the stocky, powerfully built Neanderthals had already been living there for hundred of thousands of years.

In April, 2010 the eruption of Iceland's Eyjafjallají¶kull volcano turned much of Europe into an ash-strewn no-fly zone, stranding millions of travelers. But was Eyjafjallají¶kull just the start? Now, an even more threatening Icelandic volcano, Katla, has begun to swell and grumble. Two more giants, Hekla and Laki, could erupt without warning.

For Jet Propulsion Laboratory engineers, Curiosity's landing represented the culmination of many years of hard work and personal aspiration. In this video, they trace their love of space back to childhood memories and express their gratitude for being given the opportunity to land a rover on Mars.

Was Megastorm Sandy a freak combination of weather systems? Or are hurricanes increasing in intensity due to a warming climate? How did this perfect storm make search and rescue so dangerous? "Inside the Megastorm" takes viewers moment by moment through Sandy, its impacts, and the future of storm protection.

What caused the vast deforestation of Easter Island?

What makes an energy source renewable and how can we use them to power our societies?

The need for alternative energy sources is more pressing than ever.

A Greek shipwreck holds the remains of an intricate bronze machine that turns out to be the world’s first computer.

Modern wind turbines capture energy from the wind and convert it into electricity.