In a post on touchscreens, Edward Tufte pleads for us to to spend less time having a 2-d experience of our 3-d world. Thus, as interesting as it may be to learn something about how PowerPoint kills astronauts, we shouldn’t forget there are richer things to do:

Plant a plant, walk the dogs, read a real book, go to the opera. Or hammer glowing hot metal in a blacksmith shop.