Summer heat can leave a lot of us heading inside and cranking up the air conditioner. And yet, if you look at the history of this invention, you’ll find quite a few times where people said, are we sure this is a good idea?
There’s evidence that people in the Stone Age took plaquettes, limestone representations of animals, put them near the fire and watched as the light created a kind of animation. Pretty high-tech stuff for 14,000 years ago.
