From the first venture outside a spacecraft in the 60's to today, we have come a long way. The International Space Station (ISS) perhaps best represents just what we have achieved, and it deserves the episodes investigation into its construction. Discover just what it takes to become an astronaut when the episode looks at Ascan training. Theorists are already considering the emigration of humankind to Mars, but just how realistic is this. Find out in this episode of Disappearing Frontier.moreless
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