Does anyone know where these images come from?

Question

i found these images on www.leftwingconspiracy.com and they are really funny but they dont make them so i was wondering if anyone knew where they come from and who makes it

http://i152.photobucket.com/albums/s165/SpaghettiSawUs/gravity-just-a-theory.jpg

http://leftwingconspiracy.com/wp-content/uploads/2007/10/motivator8886611.jpg

http://s3.amazonaws.com/wisdm/attachments/3730/abstinence.jpg

http://fundamentallyflawed.com/images/creationism-1sml.jpg

Answer 1

Nope...

Answer 2

Well, I don't believe that you will be able to track down the actual photographer.

These are Internet photos with humorous captions added.