Will we find life in space within 24 years?
Two weeks ago NASA announced they'd found water on mars sparking new excitement about the chance of life on other planets.
But Dr Seth Shostak says it's more than just a chance. He's an astronomer at the SETI Institute who says we'll find aliens within 24 years.
In fact, he's so convinced he says he will buy every Paul Henry viewer a coffee if he has it wrong.
Watch the video for the full interview with Dr Seth Shostak.