Avsnitt 2

No space mission can succeed without communication, so our second set of Rough Science space challenges are all based around making contact. Jonathan and Kathy have to come up with a way of communicating that doesn't use sound waves - because in the vacuum of space, there's nothing for them to move through. It took two years and a million pounds to develop a pen for use in space - one that would work in zero gravity . Ellen and Mike have no money and just three days to come up with their own version. Iain's challenge is very different. He has to find a way to communicate with aliens!