For those of you who live in the USA and still use snail mail... The US Postal Service is issuing a set of four 37-cent "American Scientists" postage stamps next week. They picture Richard Feynman, Josiah Willard Gibbs, John von Neumann and Barbara McClintock. They should be available at most post offices on Thursday, May 5. If you're in New Haven CT, you can get them a day earlier, and go to the first-day ceremony at Yale if you like.