sciencehabit writes "If you've ever cringed when your parents said 'groovy,' you'll know that spoken language can have a brief shelf life. But frequently used words can persist for generations, even millennia, and similar sounds and meanings often turn up in very different languages. Now, a new statistical approach suggests that peoples from Alaska to Europe may share a linguistic forebear dating as far back as the end of the Ice Age, about 15,000 years ago. Indeed, some of the words we use today may not be so different than those spoken around campfires and receding glaciers."
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