We know Isaac Newton as the founder of classical physics in the modern sense and perhaps the most ingenious scientist in the mankind's history. He's been doing many impressive things and some of them look crazy. But before you suggest that Newton wasn't the top expert in pretty much every discipline he touched, you should read his
The Chronology of Ancient Kingdoms Amended by Isaac Newtonwhich was published as an e-book in 2005.
It's a fun reading for the summer. You will learn about every one among hundreds of kings of dozens of empires and every single act they have done in their lives. ;-)
His memory had to be formidable. It's hard to match him. But one may try. I just memorized the 250,000 collisions in the Kaggle Higgs challenge which allows me to say whether an event is "signal" without a computer, with the score 3.5, without a computer. Fun. Why can't the computers be much better than we are? ;-)
Hat tip: Frank Wilczek (Twitter), thanks!