NASA’s multi-billion-dollar Europa Clipper spacecraft is on its way to Europa, one of Jupiter’s mysterious icy moons. The mission will investigate whether the moon, whose icy crust conceals a vast ocean of liquid water, might harbour the kind of environment suitable for alien life. In their search for life elsewhere, scientists have in recent years become much more interested in the outer solar system's icy moons, once considered too far from the Sun to plausibly support life. Europa Clipper is one of several probes heading to (or planned to travel to) those faraway worlds. Will they find signs that life could exist there?

Host: Alok Jha, The Economist’s science and technology editor. Contributors: Michele Dougherty and her team at Imperial College London; Nathalie Cabrol of the SETI Institute and the author of “The Secret Life of the Universe”; and The Economist’s Tim Cross.

For more on this topic, listen to our podcast on the European Space Agency’s JUICE mission and our interviews with exoplanet hunters Didier Queloz and Jessie Christiansen.

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