<i>The first batch of space-ready lettuce is something of a tease for the NASA crew — once harvested, it will be frozen and stored away for testing back on Earth. No one is allowed to eat anything before the plants are thoroughly vetted for cosmic microbes.<p>These space germs are often fairly benign, akin to the natural bacteria that build up in any moist root bank. Russian crews are allowed to consume vegetables grow on their side of the space station, but microbe standards are strict and unwavering on U.S. space missions.</i><p>That is the strangest part of the whole article. It's amazing how much science the USSR did on long term space habitation (including growing plants) that just gets ignored by NASA. Unfortunately I can't recall the title, but I read a book on the Soviet space program maybe 10 years ago that detailed all of the progress the USSR made prior to the US SkyLab program, and honestly they were 10-15 years ahead on that stuff compared to NASA.