A constellation is a group of stars that are connected together to form a figure or picture. Explore some of the 88 official constellations and learn about some of the highlights of each.

Where did everything in our universe come from? How did it all begin? For nearly a hundred years, we thought we had the answer: a big bang some 14 billion years ago. But now some scientists believe that was not really the beginning; our universe may have had a life before this violent moment of creation. Take the ultimate trip into the unknown, to explore a dizzying world of cosmic bounces, rips and multiple universes, and finds out what happened before the big bang. Horizon takes the ultimate trip into the unknown, to explore a dizzying world of cosmic bounces, rips and multiple universes, and finds out what happened before the big bang.

Follow three professional gamers from around the world as they compete for a million dollar prize in the first Dota 2 International Tournament. In recent years, E Sports has surged in popularity to become one of the most widely-practiced forms of competitive sport today. A million dollar tournament changed the landscape of the gaming world and for those elite players at the top of their craft, nothing would ever be the same again

Beginning with the separation of the fuzzy thinking and pious fraud of astrology from the careful observations of astronomy, Sagan follows the development of astronomical observation. Beginning with constellations and ceremonial calendars (such as those of the Anasazi), the story moves to the debate between Earth and Sun-centered models: Ptolemy and the geocentric worldview, Copernicus' theory, the data-gathering of Tycho Brahe, and the achievements of Johannes Kepler (Kepler's laws of planetary motion and the first science-fiction novel).

Leaving Everest base camp to take the high road to Lhasa to see what the Chinese have done to Tibet. He sees that religion is once again tolerated, while the old Tibetan centre of the city is being replaced with modern Chinese shopping malls and nightclubs. Following the pilgrims to the holy Namtso Lake, he gets warm in a hot spring before learning how to milk a yak with a nomad family.

The final hours of WW2 changed the course of history. As the Americans inch closer to Japan the Japanese fight with greater intensity. The question now is how to end the conflict. Starve them into capitulation? Many in US command believe the Japanese will never surrender. The alternative is to stage a massive invasion that would dwarf D-Day? The massacre of millions would be inevitable. But then a third and far darker option becomes available: the atom bomb.