User:Richard Ye/Userboxes/Second Length
< User:Richard Ye | Userboxes
(Redirected from User:The Userboxer/Userboxes/Second Length) | This user knows that one second is exactly 9,192,631,770 vibrations of a Caesium atom, I'm smart. |
| This user knows that one second is exactly 9,192,631,770 vibrations of a Caesium atom, I'm smart. |