A gray piece of paper moves along a gradient. You won’t believe your eyes.
A demo of lightness perception pic.twitter.com/BSVpgcuIw1
— Akiyoshi Kitaoka (@AkiyoshiKitaoka) August 12, 2018
We keep getting bigger. Watch overweight and obesity rates move up over several decades.
After an unsuccessful battery search, the natural next step was of course to look up battery sizes and chart all of them.
Everyone has his or her own timeline, but here it is in general for Americans.