At least 30 of these viruses can be sexually transmitted. HPV transmission occurs easily among sexual partners. This is evidenced by the fact that at least 50 percent of sexually active men and women acquire a genital HPV infection at some point in their lives.
A farm worker corrals cranberries in a bog during a harvest. Every schoolchild learns that the Pilgrims couldn't have survived life in the New World without the help of the Indians. The tribes taught them which crops to plant. They introduced them to corn and other nutritional mainstays. One of these, the American cranberry, is still part of the classic Thanksgiving feast.
Corn (maize) wasn't really discovered so much as developed by the native peoples of northern Mexico, possibly as much as 12,000 years ago. It's unclear exactly which plants they started with in the development process, but one of them may have been teosinte, a tall native grass with its seeds where the tassels are on modern corn plants.