Controlling
variables in search of a hypothetical result is one of the most important
methods in science. But the concept of variables is not limited to methodology.
A variable is a reminder that a shift in perception can spring us from cliché
and deepen our knowledge and understanding.

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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.