Immortality on Earth

If you dream of immortality on Earth, you might be interested in Turritopsis nutricula, the jellyfish that never dies.

The hydrozoan Turritopsis nutricula has evolved a remarkable variation on this theme, and in so doing appears to have achieved immortality. The solitary medusa of this species can revert to its polyp stage after becoming sexually mature (Bavestrello et al., 1992; Piraino et al., 1996). In the laboratory, 100% of these medusae regularly undergo this change. Thus, it is possible that organismic death does not occur in this species!

In human terms, you can live forever, but you have to live through middle school over and over again. It's a tough call.

Via MeFi.