Close-up of glowing jellyfish swimming gracefully in deep green ocean waters.

A species of jellyfish called Turritopsis dohrnii can revert its adult cells back to a juvenile polyp stage when injured or starving, effectively restarting its life cycle, and biologists have so far failed to identify any natural limit to how many times it can do this.

Elderly man with beard and bandana, reacting to smartphone while seated indoors.

A Japanese man named Jiroemon Kimura, who lived to 116, was born in 1897 when Queen Victoria still ruled and died in 2013, meaning a single human life personally overlapped with the invention of the airplane, the atomic bomb, the internet, and Instagram

A lively view of Hollywood Boulevard with iconic landmarks and busy street life under a clear sky.

The Hollywood sign originally read HOLLYWOODLAND when it was built in 1923 as a real estate advertisement for a housing development, and it was only meant to stand for 18 months, but nobody ever got around to taking it down and the city eventually adopted it as a landmark