We know there are a few species that don't die of old age, like the giant tortoise and naked mole rat. But those species aren't truly immortal — as they still eventually die. These tiny worms might be a different story... one which could have major implications for humans trying to live longer.
The naked mole-rat lives for thirty years - compared to 1-2 years for other rodents - and we've never found any evidence that it can get cancer. Now we're peeking inside its genome to figure out what makes it special.
All animals eventually grow old and die. It's an inevitable fact of life - except when it isn't. Some animals, like tortoises and lobsters, never grow old, and learning their secrets could let humans live as long as they want.