Kinda off topic, but anyone ever notice the easter egg of another test subject running back when the walls opened up after you get the glados potato?
Aperture because of the ending to Portal 2.
co-op bots
D0g is the most kick-ass robot in the Valve world. He did things no silly Aperture AI could do.
two biggest scientific rivals of all time
Edison vs. Tesla!
Aperture because you couldn't fly the helicopter, and moar space.
Albert Einstein vs Steven Hawking