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In a north London hospital, scientists are growing noses, ears and blood vessels in the laboratory in a bold attempt to make body parts using stem cells.

How does it spread? The Varroa mite carries the disease, feeding on bee larvae, then the virus itself kills off the bees. The study's lead author, Dr. Lena Wilfert, of the University of Exeter's Centre for Ecology and Conservation, said they found evidence that human involvement has played a key role in the epidemic.

More than 60 years ago, Johns Hopkins researchers took cells from a cancer patient - cells that fueled medical breakthroughs, but were used without her consent. Now, her family has reached an agreement with the National Institutes of Health. Terrell Brown reports.

His "Photo Ark" currently houses images of more than 5,000 species, rolling past the viewer. "It would take two hours to see them all," he said. "It's supposed to just overwhelm people with what life looks like on Earth." And what might soon be extinct.