It's got a head array to prevent your head from exploding from awesomeness. That's not what an array does, but it is now. Rumor has it Teddy Roosevelt rode around on one of these bad boys.

Graphic designer Andrew Keir thought up the idea behind these promotional posters for the Smithsonian, even though the Smithsonian never commissioned them (and threatened to sue if he sold them). They're going around the internet again because memories are short and they're awesome enough to be seen again, anyway.