Largest organisms! So many freaky things on there. Particularly under "Arthopods."
"The largest arthropod ever known to exist was either the eurypterid (sea scorpion) Jaekelopterus or the Carboniferous millipede Arthropleura, which were both between 2.5 and 2.6 m (8.2-8.5 ft) in length. They were closely followed by Pterygotus, an aquatic eurypterid that was up to 2.3 m (7.5 ft) in length."
I was having trouble envisioning an eight foot centipede, so I just imagining an insect stretching diagonally from one corner of my bed to the furthest opposite corner. Seems about right.
Anyway, sweet dreams, everyone.