Not 'Just a Theory'

In science, the term 'theory' doesn't mean quite what it does in daily life, the New York Times' Carl Zimmer writes. The Times asked readers to write in about misperceptions that annoy them, and this got the most likes on its Facebook page.

"In everyday conversation, we tend to use the word 'theory' to mean a hunch, an idle speculation, or a crackpot notion," Zimmer notes. "That's not what 'theory' means to scientists."

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