Science Weekly Space Bumper Special!

This week, to celebrate the 50th anniversary of man walking on the moon, it's a space special on the Science Weekly! Sarah Cruddas, author of 'The Space Race' joins Dan to chat all about the mission to get people on the moon, Dan and the question 'what makes something invisible?', we find out how deadly space really is, we speak to scientist Chris Riley all about the moon landing and his book 'Where we once stood', and it's a special space science in the news!