I've posted some of these before but I want to make them known again
>Svalbard didn't exist on any maps before around 2012
>The movie "Jingle All the Way" was called "The Toy" originally
>Bermuda Triangle used to be more south
>The heart used to be described as a singular, unique, round shaped organ, now it's known as a sort of "tangle" of large blood vessels
>Penguins used to only be from Antarctica, now they're from lots of different places