Playing God with Neanderthal DNA?

In 1856, workers at a German quarry found some bones in a cave. They took the bones to a local teacher, Johan Karl Fuhlrott.

To Fuhlrott, while the bones appeared human, they were unlike those of any living European. Eventually, scientists concluded that the bones belong to an extinct species of hominid which they named after the place where the bones were found: the Neander River Valley, or Neanderthal in German.

Paleontologists estimate that Homo neanderthalensis were extinct no later than 25,000 years ago. Yet if one scientist has his way, Neanderthals could make a comeback.