Salad is not just a food; it's home to a flourishing community of mostly benign microbes. A new inventory finds surprising differences in the bacteria growing on popular fruits and vegetables.

Organizers announced the permanent tagline to honor Roger Ebert.The annual Conference on World Affairs begins Monday at the University of Colorado in鈥�

Heritage Auctions is selling items that have gone to the moon. The bidding for Buzz Aldrin's light blue,Lactona toothbrush starts at $9,000. You can also bid on Apollo astronaut Richard Gordon's comb.