Clock accurate to 1 second in every 3 billion years… Welcome to Pembrokeshire U3A › Forums › Science and Technology › Clock accurate to 1 second in every 3 billion years… This topic is empty. Viewing 1 post (of 1 total) Author Posts July 10, 2013 at 8:47 am #7586 AnonymousGuest A clock accurate to 1 second in every 3 billion, yes billion, years !!! :Bit too big to wear on your wrist but whow how accurate is that. 😮 See:- http://www.bbc.co.uk/news/science-environment-23231206 Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In