Envy is green, anger is red, and exoplanet artist
renderings are usually swirly brown. Purple used to mean royal, until the
chemists figured out how to make it cheaply. Blue is usually the last color to
be introduced into a language. And for the philosopher? It’s all qualia.

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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.