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.
Maize was developed from a wild grass (Teosinte) originally growing in Central America (southern Mexico) 7,000 years ago. The ancestral kernels of Teosinte looked very different from today's corn. These kernels were small and were not fused together like the kernels on the husked ear of early maize and modern corn. By systematically collecting and cultivating those plants best suited for human consumption, Native Americans encouraged the formation of ears or cobs on early maize.