When it's under stress the jellyfish Turritopsis nutricula, which can be found in Caribbean waters, can return to the polyp juvenile stage of its life, effectively escaping death. This abilitiy has earned it the nickname of "immortal jellyfish". By studying this fascinating animal we could learn many things about aging that can be useful to humans.

The original version of this article is in Spanish. You can access it by clicking on ESPAÑOL at the top right of you screen. You can also contact our editor Mónica Feliú-Mójer (moefeliu@cienciapr.org).