Rock Doc

The Michael Crichton book "Jurassic Park" and the movie based on the best-seller presented what might happen if scientists were able to clone extinct dinosaurs, bringing them back to life. While nothing like that is possible at this time, a good thing when you recall the mayhem the dinos caused in the world Crichton conjured up ; sometimes scientists surprise themselves in breathing new life into old organisms.

One example of some success in what's sometimes called "resurrection ecology" comes from a small island that lies off Antarctica. The place is called Signy Island. It's one of the South...