Dr Aderin-Pocock said: “I sometimes wonder where the aliens are, but I have little doubt that they’re out there. It’s the numbers game.
“There are just too many planets, galaxies, solar systems, moons and stars to think there can’t be more life.
“I think though that there’s a great many variables that would need to happen to result in us making contact.
“Maybe they came in the age of the dinosaurs and left because they had no one to communicate with.
“I actually think that aliens arriving would be brilliant for us. Us putting aside our differences and getting our act together to face invading aliens might finally unite humanity.”