Editing 54: Science
Revision as of 08:49, 13 May 2016 by Markhurd (talk | contribs) (Undo revision 120007 by 108.162.221.27 (talk): It's 13.8 billion=13,800 million (short scale))
Warning: You are editing an out-of-date revision of this page. If you save it, any changes made since this revision will be lost.
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.