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XYkD TIL Considered some of the world’s smartest birds, crows operate with brains about 1/1000th the size of an adult human’s. They memorize and coordinate events over distances, they develop tools, and they teach their young lessons to pass down to future generations.
KLZR TIL Fritz Haber helped feed the world, but he also developed the first chemical weapon used in warfare. He is often referred to as “father of chemical warfare.” Haber may have saved more lives than anyone else in history, but he did so accidentally while trying to formulate new ways to kill people.
07Oy TIL British empire, “the empire on which the sun never sets”, was the largest empire in history. By 1922 it held sway over about 458 million people, one-fifth of the world’s population at the time. The empire covered more than 13,012,000 sq mi, almost a quarter of the Earth’s total land area.