Recently, a man's sight was returned to him after losing it for 12 years. How did he do it? Surgeons drilled a hole through one of his canines, put a lens in it, and implanted the construct in his eye. [more inside]
posted by scrutiny on Jul 18, 2009 - 65 comments

The narwhal, often termed "The Unicorn of the Sea," has a really odd tusk. It's long, spiraled, and there's only one of 'em per animal. Its purpose has been disputed for ages, but at long last, it seems that the answer has been found. And it's pretty damn cool.
posted by greatgefilte on Dec 13, 2005 - 69 comments

you don't have an excuse not to floss anymore
posted by prescribed life on Nov 12, 2003 - 52 comments

A 32,000 year old etching on an ivory mammoth tusk is linked to the constellation Orion which may have been used as a primitive "pregnancy calendar" designed to estimate when a pregnant woman will give birth. The oldest known drawing of a star pattern, it was created by the mysterious Aurignacian people about whom we know next to nothing save that they moved into Europe from the east supplanting the indigenous Neanderthals.
posted by stbalbach on Jan 26, 2003 - 17 comments

Scientists grow pig teeth in rat intestines. Wait! Keep reading . . .
[This] experiment suggests the existence of dental stem cells, which could one day allow a person to replace a lost or missing tooth with an identical tooth grown from his or her own cells.
So can I stop flossing now?
posted by mikrophon on Sep 26, 2002 - 25 comments

but does it have vibrate? A prototype tooth implant which picks up digital signals from radios and mobile phones goes on show at the Science Museum in London this week.
posted by moth on Jun 20, 2002 - 14 comments

Arnold had a full grill in Total Recall, but Hopes for manned — and especially a "womanned" mission to Mars — might hinge on teeth. The bone-weakening effects of zero-gravity environments might lead to permanent tooth loss, says a government dentist. via Slashdot
posted by adampsyche on Aug 28, 2001 - 13 comments