We look up and we look down and in both directions we chill with awe. We look up to the universe and envision hundreds of billions of galaxies. We look down to the atom and imagine minuscule, infinitesimal particles and forces. This is reality. And as human beings, strangely, we fit just about in the middle.
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Dimitar Sasselov is a Professor of Astronomy at Harvard University and the Director of the Harvard Origins of Life Initiative.
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