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From the Europan oceans to the Jovian clouds, life has plenty of places to hide.

Why methane on Mars is a sign of something extraordinary.

Life on other planets will likely have these telltale signatures.

When we find ET, which faiths will bend, and which will snap?

Movies get alien bodies right, but not alien ecosystems.

A conversation with the linguist who helped Amy Adams communicate with aliens in Arrival.

Why the search for alien technology is about to get much more efficient.