Iron Is Better Than Fluoride At Preventing Cavities, But There's A Catch

Materials scientists studying beavers have discovered why the crafty rodents never get cavities: the enamel in their teeth is rich in iron. Iron, they found, resists acid more effectively than fluoride. » 2/23/15 10:20am 2/23/15 10:20am

Terrifying "Living Fossil" Caught Off The Coast Of Australia

Frilled sharks have been around for 80 million years, but they are very rarely seen. So it was quite the event when one of these "living fossils" was snared in an Australian fishing net last week. » 1/21/15 10:20am 1/21/15 10:20am

Doctors Removed a Tooth Growing Into a Man's Nose

No, this isn't a case of a kid sticking a tooth into his nose and getting it stuck. This is a tooth that grew up into a guy's nose. Basically, he was close to being a human Narwhal. You're welcome for the nightmares. » 8/11/14 1:30am 8/11/14 1:30am

Teeth reveal that Canadian dinosaurs knew how to share

Dinosaur teeth have been studied many times already. Scratches and pits on the surface of herbivore teeth provide clues to how they fed, and what types of plants they fed on. But many of these studies look at only a few teeth, or only a few specimens. Not so with this study. » 6/16/14 3:33pm 6/16/14 3:33pm

Surgeons shocked to find fully formed teeth in a baby's brain tumor

Sometimes, when biology goes squirrely, it really goes squirrely. Case in point, a bizarre medical case in which a 4-month-old infant in Maryland was found to have several fully formed teeth embedded within a brain tumor. Warning: Graphic image to follow. » 2/27/14 11:20am 2/27/14 11:20am

Scientists grow teeth from human urine because why the hell not

A new study shows that stem cells extracted from urine can be turned into rudimentary tooth-like structures. Oh, and the researchers did so by growing the teeth inside the kidneys of mice. » 7/30/13 9:45am 7/30/13 9:45am

A Dental Hygiene Cartoon from the Bacteria's Point of View

Next time you go to the dentist, consider the terror that you're inflicting on the microorganisms that have made a home in your filthy teeth. » 5/18/13 10:30am 5/18/13 10:30am

This optical illusion will smash every last one of your heebie-jeebie…

Swedish artist Sandra "psychosandra" Holmbom pulls off some pretty remarkable optical illusions with makeup, but holy crap does this one take the cake — with an eldritch emphasis on "optical." » 2/26/13 2:40pm 2/26/13 2:40pm

Preserved bacteria reveal how we've been rotting our teeth for 7,500…

Bacteria outnumber the cells in our own body by a factor of 10 to 1 — as many as 100 trillion microbes per person — and yet we know almost nothing about how bacteria have changed as humans evolved. » 2/17/13 2:00pm 2/17/13 2:00pm

Good to know: Etsy retailers can sell human teeth, but not bones

Oh, Etsy, you wonderfully weird online bazaar. One can find almost anything beneath your digital marquee — from made-to-order Jayne Cobb beanies to dog toys in the shape of a penis, to bar soap carved in the likeness of a baby's face — but there's one thing you won't find for sale at Etsy: human bones. » 8/13/12 6:50am 8/13/12 6:50am

The mouth of a child is a terrifying thing to behold

Inside the mouth of every child is a terrifying double row of teeth. Not that you'd ever know it — muscle, skin and bone prevent most of us from ever catching a glimpse of this extra dentition. Here's your chance to get a close-up look at what lies beyond the gum line. » 5/17/12 2:00pm 5/17/12 2:00pm

This tiny dinosaur had the craziest set of teeth ever

The plant-eating dinosaur Fruitadens wouldn't strike much fear into a poodle, let alone your average dinosaur. Less than a meter long and weighing under a kilogram, Fruitadens seems wholly unremarkable apart from its tininess. But just look inside its mouth. » 4/16/12 4:30pm 4/16/12 4:30pm

10 Reasons Naked Mole Rats Will Inherit the Earth

Too long have cockroaches been regarded as the heirs to the planet, in the event of a huge cataclysm that drives humans to extinction. Today, we present for your consideration an alternative: the naked mole rat. » 3/01/12 11:06am 3/01/12 11:06am

How Agriculture Made Our Mouths Too Small for our Teeth

The rise of agriculture allowed for the development of complex societies and technologies that likely wouldn't have been possible otherwise. It also wreaked havoc on human health. And we can add a new downside to the list: our misshapen mouths. » 11/21/11 5:00pm 11/21/11 5:00pm

Mountain beavers evolved thicker teeth to eat volcanoes

The mountain beaver species of western North America possess some seriously weird teeth. Their teeth are thick and deep, providing the extra toughness necessary to eat hard, gritty plants. So why do they spend all their time eating soft plants? » 10/20/11 5:30pm 10/20/11 5:30pm

The ancestor of all American rodents really came from Africa

Paleontologists recently discovered rodent teeth in Peru dating back over 41 million years, making them the oldest evidence of rodents in the Americas. But despite its location, this rodent was far more closely related to today's African, not American, rodents. » 10/17/11 11:46am 10/17/11 11:46am

230-million-year-old teeth reveal sharks' adorable origins

Sharks weren't always the huge, vicious alpha predators that they are today. Hundreds of millions of years ago, they were just another tiny little harmless fish species hanging out in lakes and rivers. So yeah...things have changed slightly since then. » 9/11/11 7:00am 9/11/11 7:00am

Seriously, how many rows of teeth does a horror-movie monster need?

Check out this totally insane concept art for Creature, a new indie horror movie coming to U.S. theaters today. Creature is about a monster called Lockjaw — and the reason for the name should be pretty obvious. » 9/09/11 8:30am 9/09/11 8:30am

Fossilized teeth reveal that ancient women had to leave home to find…

Your teeth can reveal a lot about you - including where you grew up. They're also the part of you that's most likely to endure long after you've died. Now some ancient teeth are revealing dating habits that date back a million years. » 6/02/11 3:52pm 6/02/11 3:52pm

Teeth-clenching + mathematics = a danger?

New research from Japan suggests that there may be no harm in refraining from teeth-clenching whilst performing mathematical tasks. » 5/22/11 9:50am 5/22/11 9:50am