🔬 Science 3d ago · Ethan Siegel

10 big questions about the search for life beyond Earth

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10 big questions about the search for life beyond Earth
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In our quest to understand what’s out there in the Universe, one cosmic unknown looms larger than all the rest: are there other examples of life, complex life, intelligent life, and technologically advanced life out there beyond planet Earth? And if there are other examples out there, a slew of follow-up questions seem inevitable.

How common, uncommon, or rare are those types of life?
Are there other technologically advanced, or even spacefaring, civilizations out there, perhaps even within our

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