True science, mad science, ended in the later 50's.
Yeah...
But then Aperture started in the 60's, which is the only exception. Lobotomies? HELL YEAH
ALL HAIL ‼SCIENCE‼
Ah, but see, you're forgetting that due to trace amounts of time travel involved in some of their testing, much of Aperture's research during the 60's actually occured in the 50's.
Wait, if they researched time travel too, then what's the point of researching portals?
or are you making this up? I didn't finish the game
Right, but remember, which takes longer? To design, model, and build a working portal gun, OR design, model, and build a time machine to transport you into the future when you've
already built the portal gun and then take it back? I don't want to be a part of spoiling any of the sweet, sweet, writing of Portal, so, as to that,
There are references to time travel in some tests, but we never see any first hand and it's not really a part of the story, more just used for some good lines.
Paraphrased: This next experiment involves trace amounts of time travel. If you see someone who looks like you, don't look them in the eye. Seriously, the lab boys say it could destroy time. Forever. Forwards and back. So if you see yourself running through the course, just let that handsome devil go on his way.
Also:
Just watch out for those Mantis Men
EDIT: Added screenshot