The European Union has been in the news a lot lately, so let's take a look at what it's all about. What is a "union" and what's the purpose of this one?

This animated video shows how tuberculosis, still a very common disease, spreads and is fought by our bodies. Find out more about MSF’s work treating tuberculosis around the world.

They may have very different reputations, but both the great white shark and killer whale are fierce predators that face off in a showdown atop the ocean food chain.

We continue to explore the phenomenon of hurricanes. Why are they so dangerous? And do they serve any purpose?

In recent years, we've seen an increase in the intensity of tropical storms and hurricanes due to global warming. But how and why do hurricanes form? Sigrid provides a basic explanation of this phenomenon.

Sigrid explains how a spelling bee normally proceeds. There are fixed rules and there are options.

Ever year, the winter solstice comes on December 21 in the Northern Hemisphere. Not only is it the first day of winter, it's a turning point, as the days will then get longer.

Jonathan gets back to filming so that Neal can show off his skills as a shark handler. He controls the big sharks through various maneuvers, including his ultimate demonstration: holding a shark vertically using only one arm—almost like a shark headstand!

Sigrid talks about "The Elementary Spelling Book" by Noah Webster, which was the basis for the American English dictionary and a big part of the development of spelling bees in the United States.

Let's find out more about an American activity aimed at school kids: the spelling bee. What is it and how does it work?

Following shark handler Neal’s expert example, Jonathon tries his hand at relaxing the reef sharks into the extremely tranquil state of tonic immobility… an unforgettable experience for the wildlife enthusiast!

Pre-production is finally over, and today is the first day of the shoot. The cast and crew come together for a traditional Maori welcoming ceremony, and Peter Jackson and members of the cast offer words of thanks and encouragement.

Shark handler Neal wants to find Jonathan a smaller silky shark to begin his training, but when the little sharks give them the slip, Jonathan is straight in at the deep end, witnessing first hand a feeding of the much larger Caribbean reef sharks!

Andy Beem (Windsports, CA) and Billy Vaughn (Kitty Hawk Kites, NC) talk about flying 1895 Lilienthal and the 1902 Wright glider replicas, and engaging with the history of human flight on a tactile level.

Director and producer Peter Jackson takes time out from filming The Hobbit to show us around the set and the busy wardrobe and props departments. We get an idea of the scale of the preparations that go into filming an epic blockbuster movie.