How did tardigrades become immortal?

It seems every few months, a news article pops up talking about the indestructible Tardigrade - otherwise known as the "water bear" or "moss piglet." These resilient little animals can survive radiation in space, freezing for 30 years, and completely drying out their bodies. So how exactly are they able to do this? James brings in a recent paper diving into the details of Tardigrades' little survival hacks. Read the paper and news articles here.