News Space Proton’s radius revised downward Surprise measurement may point to new physics Share this:FacebookTwitterPocketRedditPrintEmail By Andrew Grant January 24, 2013 at 8:34 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe