This continued until Number 16 was 43 years old — and had officially earned the title of oldest known spider in the world. In fact, she was 15 years older than the captive spider who once held that title.
As a trapdoor spider, Number 16 rarely left her burrow for more than a few minutes — and with such a complex system of tunnels and secret doors, she didn’t really need to. She used the tiny camouflaged doors as easy exit points to catch insects by surprise, and then retreated back inside with her food, sealing the door shut behind her.
It was a method she perfected, which has left scientists with an extraordinary look into the longevity of trapdoor spiders — so much so that they’ve just published a study about everything they’ve learned from her.