CHICAGO (Reuters) - Scientists in Spain have unlocked the genetic code of the immortal jellyfish - a creature capable of repeatedly reverting into a juvenile state - in hopes of unearthing the secret ...

Like other types of jellyfish, the T. dohrnii goes through a two-part life cycle, living on the sea floor during an asexual phase, where its chief role is to stay alive during times of food scarcity.

They sting, even kill, swimmers. They block the cooling systems of power plants. They clog fishing nets and kill penned salmon. In recent years, reports of havoc caused by swarms of jellyfish have ...