1. Scientists accidentally discover even 'Grander' Canyon: Scientists have—totally by accident—come across a hidden canyon that dwarfs the Grand one. This one, though, has never been seen by humans. It's under the ice of Greenland.
2. Scientists unearth world's largest fish: As far as discoveries go, this one is pretty astounding on three counts: It came about by chance, expanded our knowledge of "gigantism," and revealed the world's largest fish.