PSA: Why Pluto isn't a planet · 7:32pm Jul 28th, 2015
First off, Pluto's really, really cool. Pun not intended.
Like, look at that thing. A couple years ago, it was a smudgy, low-resolution blob at the edge of the solar system. Now it's this gorgeous thing, with mountains, an atmosphere, a geologically active surface and massive glaciers made of nitrogen ice.