Ciaran and Dan delve into one of the biggest mysteries of all time: Are we alone in the universe?  With the help of Voyager Golden Record artist Jon Lomberg and more, we try to discover how we might know if something else was out there and if we ever did discover alien life, how would we talk to it?  Plus, we tell you about a very special project called Mission Transmission. Fun Kids is sending your voice to space. Enter now at FunKidsLive.com.  Mysteries of Science is a fortnightly podcast created by The Week Junior's Science+Nature magazine and Fun Kids. Tap follow or subscribe wherever you're listening to this to make sure you never miss an episode. Get three copies of The Week Junior's Science+Nature magazine for just £5. sciencenature.theweekjunior.co.uk/podcast is the place to claim yours. See omnystudio.com/listener for privacy information.