New study asks how your favorite doggos came to be

Dogs: We love them. Like, a lot. In fact, humans have been hanging out with doggos for at least 15,000 years or so, and likely a lot longer. Over the course of that long, mutually beneficial friendship, we’ve done a lot of strange things to our four-legged companions, controlling their reproduction to coax them into breeds that suit our (sometimes absurd) needs.

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A 130,000-Year-Old Mastodon Threatens to Upend Human History

IN 1993, CONSTRUCTION workers building a new freeway in San Diego made a fantastic discovery. A backhoe operator scraped up a fossil, and scientists soon unearthed a full collection of bones, teeth, and tusks from a mastodon. It was a valuable find: hordes of fossils, impeccably preserved. The last of the mastodons—a slightly smaller cousin of the woolly mammoth—died out some 11,000 years ago.

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How hot peppers and marijuana could help cure gut problems

Your gut is something of an immunological mystery.

Unlike the rest of the body, which tends to treat foreign invaders with a singular purpose—seek and destroy—the stomach cannot afford to be so indiscriminate. It exists to help fuel the body, and that means routinely welcoming foreign bodies in the form food.

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