For all scientists here that also like Wolfenstein 3D (the 90's DOS game):
Speculative:
What if there was a Wolf3D level, in which you fought a boss that was Charles Darwin himself, armed with futuristic machine guns and special, full body armor. Let's say this takes place centuries in the future from 2008.
Plot:
A time machine was created with help from physicists around the world. One of them went back into the 19th Century and stole Darwin right from his ship, and brought him into the year 2350 or, something.
When you see him for the first time, he would yell:
"Die, Allied Fish-lover!", referring to fish symbols on people's cars.
And, when you killed him, he would plop on the floor, in a pile of goo, right where he predicted we came from, bacteria to be more exact.
Someone should make a level like this? Come on all you Wolf3D fans that do not deny modern science!