Show a human a closed door, and no matter how many open doors she finds, she’ll be haunted by what might be behind it. A few people liked to paint this drive as a weakness. A failing of the species. Humanity as the virus. The creature that never stops filling up its available living space. Hector seemed to be moving over to that view, based on their last conversation. But Anna rejected that idea. If humanity were capable of being satisfied, then they’d all still be living in trees and eating bugs out of one another’s fur. Anna had walked on a moon of Jupiter. She’d looked up through a
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