Did you know that ancient Romans used urine as a teeth whitener? (Gross, but true. ) Or that in 16th-century England, soot ...
Cilk1 deficiency disrupts normal tooth development by altering primary cilia function and weakening Hedgehog signaling. This ...
Smithsonian Magazine on MSN
Sharklike Fish With Weird, Buzz-Saw Jaws Sliced Through the Seas, Then Vanished. Now, Paleontologists Are Unraveling Their Secrets
These "total monsters of fishes" are extinct today, though new clues about their lives come from CT scans and their closest ...
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