Arrival of European Breeds Wiped Out Native American Dogs

Man's best friend was also the first animal to be domesticated. On that point, archaeologists overwhelmingly agree. Yet the origin of dogs (as we know them today) has always been a controversial area of research. From wild wolves, early humans bred a new type of canine that was designed to suit their own needs. This might have happened as recently as 15,000 years ago or as far back as 32,000 years ago. See more

Rinse and Spit: The History of Toothpaste

In 2010 rocker Patti Smith gave the commencement address at the Pratt Institute in New York, and those graduating seniors got some incredibly sound advice: "Now that I'm here, my greatest urge is to speak to you of dental care," Smith joked. "My generation had a rough go, dentally. Our dentists were the army dentists who came back from World War II and believed that the dental office was a battleground. You have a better chance at dental health." See More

FDA OKs First Marijuana-based Drug

Do Fire-breathing Dragons Torch Their Teeth?

Ever Stand Up and Get Dizzy?

Some bodily phenomena make sense. An ice cream headache, for example — you know what you did to get there, you know you deserved it, and you have absolutely no regrets. Others are a bit of a mystery, like when you stand up quickly and see a dizzying array of stars. The good news is, a sudden bout of lightheadedness from jumping out of your seat probably isn't a big deal. But there are certain signs you should look out for that might indicate a more serious issue. Here are some common causes of that familiar head-spinning sensation: See More >>>