Fun Fact Friday (#74)

Fun Fact Friday is a meme hosted by Lettora at I’m Booked! If you’d like to join and do your own Fun Fact Friday, just ask! At I’m Booked! Every week we’ll give you five new, fun facts. 
This week’s five facts:

1. Dogs wag their tails to the right when they're happy and to the left when they're frightened.

2.  90% of all meteorites ever found have come from Antarctica.

3.  A rat can last longer without water than a camel.

4.  The Marshall Islands won't exist if we warm the planet 2 degrees.

5.  The U.S. has more Spanish speakers than Spain.