5 Questions

Image: NASA/A. Fujii

Nicolaus Copernicus, the 16th-century Polish astronomer and mathematician, wasn’t the first to suggest that the Earth wasn’t the center of the universe—the idea originated with the ancient Greeks—but he was the first to prove it with a mathematical theorem.

The issue of race is foremost in the nation’s consciousness as events in Ferguson, Mo. unfold. But for Valerie Purdie-Vaughns, there is a more important message.

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