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
For various occupations, the difference between the person who makes the most and the one who makes the least can be significant.
We know spending changes when you have more money. Here’s by how much.
What is old? When it comes to subjects like health care and retirement, we often think of old in fixed terms. But as people live longer, it’s worth changing the definition.