11.There are only three countries in the world that don't use the metric system.

12.The longest place name on the planet is 85 letters long.

13.Four babies are born every second.

14.The coldest temperature ever recorded was -144 degrees Fahrenheit.

15.The Earth's ozone layer will make a full recovery in 50 years.

16.Japan is the world's most earthquake-prone country.

17.There are around 4 quadrillion quadrillion bacteria on Earth.

18.People who are currently alive represent about 7 percent of the total number of people who have ever lived.

19.Muhammad is thought to be the most popular name in the world.

20.Only two countries use purple in their national flags.