So says the message from the human race on the Voyager spacecraft. But is there, y'know, anyone out there? Alex went to speak to an astrophysicist to find out. This is what he's learnt: Stellar Wobble. The Mirror Test. Fermi’s Paradox. The Enhanced Human and murderous dolphins. Somewhere between stand-up and an astrophysics lecture, Third Angel brings you a simple show about huge ideas. 600 People explores the stories we tell in order to understand our place in the cosmos, that asks if there are extra terrestrials in our galaxy, that asks what it means to be human. We said they were big ideas…