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WASHINGTON (Reuters) - A genetic peek deep into the heart of Africa confirms that Africans have more genetic diversity than Europeans or Asians and provides insights into how to live a long life despite disease and famine.

HIV drugs prevent infection in African study

The first U.S. clinical trials in more than 20 years on the medical efficacy of marijuana found that pot helps relieve pain and muscle spasms associated with multiple sclerosis and certain neurological conditions, according to a report released Wednesday by a UC research center.

NASA Releases First Images From WISE Satellite: The infrared satellite will scan the entire sky searching out previously unseen comets, asteroids, stars and galaxies.

Pluto, Discovered 80 Years Ago, Still a Big Mystery

New way of tracking cancer uses DNA changes: US study