The Fact Edition

Please keep a look out of the most random facts of all history, every once in a while, I will post a whole bunch of facts. Have fun.

The Most Random Facts (1)

1.  In 2010, BMW had to recall their GPS system because male German drivers refused to take   directions from a female voice.
2. The ancient Romans used stale urine as a teeth whitener because the ammonia in the urine acted as a teeth whitener.
3. Horses can't vomit.
4. There are no clocks in Las Vegas casinos.
5. We forget 80% of what we learn every day.
6. Most people who read the word 'yawning'will yawn.
7. Your brain is more active when you sleep.
8. Elephants are the only mammals that can't jump.
9. The most productive day of the workweek is Tuesday.
10.  1 in 4 Americans have appeared on T.V