If we met new life—on this planet or the next—would we know it when we saw it?

If we met new life, would we know it when we saw it? Matthew Francis investigates for Mosaic.

“Why would NASA want to study a lake in Canada?”

Three different border guards asked me variations on that question, and while they ultimately let me pass, it was obvious they didn’t understand. Why is NASA interested in a lake in Canada? And what business is it of mine?

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