In recent years, astronomers have been caught up in one of the most exciting scientific quests - to find new planets around distant stars. Planets from Hell tells the story of these hostile new worlds that have been discovered and explores the tantalising possibility of one day finding a planet like Earth.
A look at how our solar system is teeming with thousands of asteroids and comets. While an impact would be catastrophic for human life, it is now thought these mini-worlds played a vital part in kick-starting life on our planet.
Following NASA's successful landing of a probe on an asteroid, these mysterious objects are now yielding their secrets.
Cosmologists answer questions about the shape and size of the cosmos, and how, by decoding radiation from the dawn of time - 15 billion years ago - they can discover the limits and the ultimate destiny of the Universe.
This documentary follows 8 teens and pre-teens as they work their way toward the finals of the Scripps Howard national spelling bee championship in Washington D.C. All work quite hard and practice daily, first having to win their regional championship before they can move on. Interviews include the parents and teachers who are working with them. The competitors not only work hard to get to the finals but face tremendous pressure as the original group of over 250 competitors is whittled down and the words they must spell get ever more difficult.