Eratosthenes calculated 11 June 1184 BC as the date of the sack of Troy. He is, of course, more famous for calculating the circumference of the earth.
I started sketchnoting. I write rather copious notes, usually longhand and rather details – perhaps too detailed, but I decided to use my love for drawing to make life more interesting. Unfortunately, I think a lot of other people see it and think I’m just screwing around, so I might be careful in doing it.