There
are the limits that are formally unbeatable: things like the speed of light and
quantum indeterminacy. They’re interesting because they describe an unexpected
border between the philosophical and technological. And because we are still
trying to beat them.

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Space Colonization and the Meaning of Life
Colonizing the galaxy is the highest good humanity could achieve.
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The Surprising Importance of Stratospheric Life
The science of bacteria in the atmosphere is getting its moment in the sun.