Unable to connect, retrying...
Online collaborative whiteboard. Powerful, engaging with timer, emoji's, commenting and voting.
Search for RSS feeds

JF Ptak Science Books

A Daily History of Holes, Dots, Lines, Science, History, Math, the Unintentional Absurd & Nothing |1.6 million words, 7500 images, 3.9 million hits| Press & appearances in The Times, The Paris Review, Le Figaro, MENSA, The Economist, The Guardian, Discovery News, Slate, Le Monde, Sci American Blogs, Le Point, and many other places... 4,000+ total posts