Karl visits Jessica the Hippo and makes a King his dinner as he heads to Uganda.

Artist Nathalie Miebach takes weather data from massive storms and turns it into complex sculptures that embody the forces of nature and time. These sculptures then become musical scores for a string quartet to play.

Physiatrist and engineer Todd Kuiken is building a prosthetic arm that connects with the human nervous system -- improving motion, control and even feeling. Onstage, patient Amanda Kitts helps demonstrate this next-gen robotic arm.

What does it feel like to fly over planet earth (Time-lapse International Space Station)

In an exclusive unseen clip, Karl gives us his thoughts on his experience building an igloo. Plus a sneak peak of next week's episode.

Dog Sledding in Alaska, a visit to the North Pole and Deep Sea fishing. It's fair to say Karl doesn't like it much.

In an exclusive unseen clip, Karl ruminates on the effect of his makeover. Plus get a sneak peak of Episode 4.

It's the classic thing to do before you die. But before he gets to the Dolphins in Australia, Ricky and Stephen have arranged a stopover in Thailand.

More and more, nations are waging attacks with cyber weapons -- silent strikes on another country's computer systems that leave behind no trace. (Think of the Stuxnet worm.) At TEDxParis, Guy-Philippe Goldstein shows how cyberattacks can leap...

What would happen if we could generate power from our windowpanes? In this moving talk, entrepreneur Justin Hall-Tipping shows the materials that could make that possible, and how questioning our notion of 'normal' can lead to extraordinary...

In Rajasthan, India, an extraordinary school teaches rural women and men -- many of them illiterate -- to become solar engineers, artisans, dentists and doctors in their own villages. It's called the Barefoot College, and its founder, Bunker Roy,...

Here's a powerful provocation from artist Jae Rhim Lee. Can we commit our bodies to a cleaner, greener Earth, even after death? Naturally -- using a special burial suit seeded with pollution-gobbling mushrooms. Yes, this just might be the...

On any given day we're lied to from 10 to 200 times, and the clues to detect those lie can be subtle and counter-intuitive. Pamela Meyer, author of Liespotting, shows the manners and "hotspots" used by those trained to recognize deception -- and...

Imagine it's late 1990, and you've just met a nice young man named Tim Berners-Lee, who starts telling you about his proposed system called the World Wide Web. Ian Ritchie was there. And ... he didn't buy it. A short story about information,...

A story, a work of art, a face, a designed object -- how do we tell that something is beautiful? And why does it matter so much to us? Designer Richard Seymour explores our response to beauty and the surprising power of objects that exhibit it.

"Babies and young children are like the R&D division of the human species," says psychologist Alison Gopnik. Her research explores the sophisticated intelligence-gathering and decision-making that babies are really doing when they play.

Conductor Charles Hazlewood talks about the role of trust in musical leadership -- then shows how it works, as he conducts the Scottish Ensemble onstage. He also shares clips from two musical projects: the opera "U-Carmen eKhayelitsha" and the...

Less than 10% of plastic trash is recycled -- compared to almost 90% of metals -- because of the massively complicated problem of finding and sorting the different kinds. Frustrated by this waste, Mike Biddle has developed a cheap and incredibly...