A drug used for Alzheimer's proves to be a breakthrough in fixing rotten teeth as well.
Even without brushing their teeth or drinking fluoridated water, beavers have remarkably strong teeth good for gnawing on wood. A new study shows that their tough teeth are all thanks to a key component built into their chemical structure, and it's iron.
Remnants of a nearby supernova that exploded only 340 years ago has been well studied by scientists, but apparently still holds many mysteries. A new study has realized that Cassiopeia A (Cas A) is composed of a collection of about a half dozen massive cavities, or "bubbles," making the supernova look like "Swiss cheese."