On November 2, 2000 was the last time all humans were on the planet together. Since then at least one person has remained on the international space station at all times. And yes, being on an airplane while it’s flying in the atmosphere, technically constitutes being on the planet, and being technically right is the best kind of right.
I really thought we’d have a Moonbase by now... but the International Space Station is pretty cool too. You know what else is cool? Sharing Twisted-History. It just doesn’t get any cooler than that.