What’s with the tally marks?

In the geek world today, you may see people covered in tally marks. On April 23, 2011, there was an episode of Doctor Who that aired called “The Impossible Astronaut“, where Doctor Who and his companions encounter the Silence, a race of aliens with the ability to make people forget their encounter with them when they look away.  So today, April 23, 2013, Doctor Who fans are commemorating this by drawing tally marks on their bodies to keep track of the number of times they’ve encountered the Silence.  Send us your tally mark photos, and we’ll add them to our Facebook album, to make sure we never forget.  The Silence will fail.