Do you see the difference in these two pictures? Below is one of the first war-time photos ever taken. Turns out there are actually two. One’s real, one’s not. Looks like people were photoshopping even in the 1800s. Listen to this podcast. It’s hilarious and fascinating.
http://www.radiolab.org/story/239499-in-the-valley-of-the-shadow-of-doubt/
