The Codex Leicester -

And it just so happens to be one of the most expensive books on planet Earth. Despite the fancy name, this isn't a dusty medieval poem. It is a 72-page scientific notebook written entirely by Leonardo between 1506 and 1510. It is a firehose of genius, covering geology, astronomy, optics, hydrodynamics, and paleontology.

In one paragraph, he jumps from the flow of a river to the cratering of the moon to the growth of a tree. He saw no barrier between art, science, and nature. To him, the curl of water in a fountain followed the same mathematical rules as the curl of hair on a human head. You don’t need $30 million to think like Leonardo. You just need a notebook and a willingness to ask dumb questions. the codex leicester

That Leonardo lives in the Codex Leicester . And it just so happens to be one