How the Astounding magazine created most of our memorable science fiction (please click through on this one, if only to browse the old magazine covers! Incidentally, this led me to the illustration work of Elliott Dold)
Explaining weird natural phenomena: hair ice (makes you wonder how much more is out there to be explained!)
People who play MMORPGs really do live inside them: here’s a story about “dramatic events” inside EVE Online
Fungi, without our brains, without basic nervous systems, without even the vascular system that plants use, are still able to have multi-cellular signaling, somehow