“Physicists study the vast number of stars, examining equations and mathematical odds, and say there must be something else out there like us. Biologists look down at our own planet, at all the specific things that occurred
for evolution to work, and say, ‘not likely.’ It’s not a math equation, but if it were, the sheer odds of other sentient life even remotely like us are incalculable—even in the vastness of outer space.”