Science guy Bill Nye says the two logical places to search for alien life in our solar system are Mars and Europa, the smallest of Jupiter's four moons. Why Europa? Nye gets into some details in this interview with Big Think, but here's the gist: Water. Water water. Water, water water water water; water water water! Water.

Earlier this month, NASA scientist Kevin Hand predicted we would find out in the next twenty years whether we are alone in the Universe. Bill Nye puts the figure at 30 years – but then, what's ten years in what would doubtless be the most monumental discovery of the 21st – or, arguably, any other – century?

[Big Think]