Amputated parts of a sea cucumber stayed alive indefinitely. Researchers call it a real-life ‘zombie’

By Jacopo Prisco, CNN (CNN) — What does it mean to be alive? A new study on an astonishing sea creature suggests the answer may be more complicated than it seems. Some amputated fragments of Psolus fabricii — a type of sea cucumber native to the North Atlantic Ocean — puzzled researchers when they noticed