1.   The town of Coober Pedy in Australia, known for its opal mines, has underground residences called "dugouts" to escape the extreme heat, with underground churches, hotels, and shops as well.

2.   The world's smallest elephant is the Borneo pygmy. An adult male measures 1.7-2.6 m (5 ft 6 in-8 ft 6 in) tall, whereas the female is 1.5-2.2 m (4 ft 11 in-7 ft 2 in) in height. The average estimated weight is 2,500 kg (5,500 lb).

3.   There are over 1,400 species of bats worldwide, making them the second largest group of mammals (after rodents).

4.   If you’re having a long sex, change your condom every 30 minutes because friction may lead to condom breakage.

5.   The lobster was also known as the poor man’s protein. These lobsters were fed to prisoners, apprentices and slaves during the colonial era.

6.   Most sloths urinate and defecate about once a week.

7.   The first Apple computer, the Apple I, was sold for $666.66 in 1976.

8.   The longest wedding veil measured 6,962.6 m (22,843 ft 2.11 in).

9.   -40 Celsius and -40 Fahrenheit are the same temperature.

10.   The sex of a sea turtle is determined by the sand's heat in which it is buried.

11.   An immurement is a form of imprisonment in which a person is placed within enclosed tight confinement, such as a coffin. The prisoner is left to die from starvation or dehydration. This type of imprisonment was practiced in Mongolia as recently as the early 20th century.

12.   The world's longest-lasting lightbulb, the Centennial Light, has been burning since 1901 in Livermore, California, with only a few short interruptions.

13.   In New Jersey, it's illegal to wear a bulletproof vest while committing a violent crime.

14.   The original Star Wars movie, later retitled "Star Wars: Episode IV - A New Hope," was the highest-grossing film of 1977 and was nominated for eleven Academy Awards, winning seven.

15.   The reason why tires are black is because of the chemical that's added to the tires called Carbon black. It's added to protect tires against U.V. light and ozone and extending the lifespan of the tires.