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Let’s Take a Break From All This Valentine’s Stuff and Learn About Word Origins With John Green

What's the origin of "species"?

Words are weird, and so are their origins. Why do we call people “dunces”?  Why do put the “kibosh” on things? Learn those origins and more from Mental Floss’ own John Green in this video.

(via Mental Floss)

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Glen is a comedian, writer, husband, and father. He won his third-grade science fair and is a former preschool science teacher, which is a real job.