For instance, teeth contain enamel, a substance much harder than bone. Despite their solid appearance ... Bones protect organs and move the body. Bones change (remodel) throughout various life ...

For the past two decades, scientists have been manipulating genes to grow human cells where you wouldn’t quite expect them.

Gruber: They make hydrodynamic sounds when swerving and accelerating, and they make crunching sounds with their teeth and jaws. But they don't have special organs for sound production and ...

a series of organs that break food down in a useful ... it's helping to dissolve that food… And the back teeth getting into their stride now, they are crushing that food! I think we might ...

special organs that prevent their food from escaping through the gills. Scientists believe their teeth—which are not used in feeding—are instead part of the mating process. In the past ...