Geekolinks: 7/19

1. The origin of Nickelodeon’s green slime (Mental Floss)
2. A lot of Comic-Con cosplay (GeekSugar)
3. Photographs of very rare birds (Environmental Graffiti)
4. Why are Germans still using the deutsche mark? (The Week)
5. Admin crisis over at Wikipedia? (The Daily Dot)
6. Einstein, King of Sweaters (ypervocal)
7. Predator, Batman, Limbaugh (Death and Taxes)

(title pic via reddit)