The death of dinosaurs allowed mammals to ditch nocturnal behavior, study finds

Have you ever wondered why modern-day mammals have adaptations for nighttime activity? A new study suggests dinosaurs might be the reason.

Jurassic Park
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Artist rendition of a Neanderthal man.

Though the care for and concern about teeth has a long history, the modern practice of dentistry has its roots in the 18th century, and quickly developed the century after that. No Neanderthal had a dental plan, and we should be thankful. That’s because a recent study of Neanderthal teeth gives us a glimpse of what life was like tens of thousands of years ago. The results, published in the journal Nature, give us unique insights into, as the authors put it, our “closed known, extinct hominin relatives.”

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