In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
There's a café in France which charges €7 for a coffee to rude customers and €1.40 to people who talk politely to staff.
17
In Mexico, artists can pay their taxes using artwork that they create.
4
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45