[throaway5454]

Brachiosaurus I think. Brontosaurus was originally thought to be a separate species from Apatosaurus but later revealed to be the same.

[masfuerte]

Weirdly this is about the fifth time I've read this in the last couple of months and it's out-of-date. Brontosaurus and Apatosaurus are divorced and living as separate species again.

[throaway5454]

The rare double gotcha fact

[NoMoreNicksLeft]

But this alienated Pluto so much that it refuses to be a planet and is out hiding in the Oort cloud again.