There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
In Montreal, there's a bus stop with swings that play musical notes when you swing on them.
20
In 1916, a US amendment was proposed to put all acts of war to a national vote. If you voted yes you would have to register as a volunteer for service in the United States Army.
5
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4