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Asthenosphere, a geologist's term for the molten layer beneath the earth's crust, sparks a journey that stretches all the way from ancient Greece to the author of Uncle Tom's Cabin. Plus: What the heck is a dogberg? It's when a dog runs into you and knocks you over. This bit of slang was inspired by a professional wrestler who finished off his opponents in a similar fashion. Finally, if you're vibing with someone, you're getting along just great. The idea of vibing goes way back in history, and is well worth the effort to suss out. All that, and pretty eggs, Rhode Island dressing, how to pronounce biopic, multiple modals, Mr. Can vs. Mr. Can't, jawn, moded, and a brain teaser for movie lovers.

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