It seems like we largely take it for granted these days, but the fact that we have humans living in space is the realization of a scientific dream a century old. Visit the space stations orbiting Earth past, present and future in this episode.
In the 1950s and 60s, the United States and the Soviet Union battled it out to see who would dominate the race for outer space. The Soviets got out to an early lead, but the U.S. would ultimately win. Learn all about the Space Race in this week's episode.
Sure today Mars would kill you with its thin, toxic atmosphere and cold desert temperature swings of 100 degrees, but early on it and Earth were practically twins. Find out how the two planets diverged and if there might be life on the Red Planet.