1. The largest of all the herd animals are the musk ox.
2. All of the hoofed mammals walks on the tips of their toes.
3. No one are quite sure how the electricity that causes lightning builds up.
4. Like desert plants, the plants of the tundra has to be equipped for life in a harsh climate.
5. None of the other continents touches Antarctica.
6. Anybody suffering from a slipped disk have weakened cartilage in the spine.
7. The smaller wheel in a pair of gear wheels turn more quickly than the larger one.
8. Most of the members of the cat family is not good swimmers, but tigers are.
9. Nothing living on the earth are capable of outrunning a cheetah.
10. Some older expressions in English is wink-a-peeps for eyes and flesh-spades for fingernails.
11. More than half of the potatoes grown in the United States comes from Idaho.
12. Every joint in the human body are surrounded by a fibrous capsule lined with membrane.
13. The dense structure of diamonds are a result of its crystallization under great pressure.
14. Part of the Sahara desert are a series of plateaus averaging 1,000 feet in altitude.
15. Most pulsars are so faint that nobody are able to see them without a very powerful telescope.
16. Nerves in the spinal cord carries signals back and forth between the brain and the rest of the body.
17. Most of the world’s great mountain ranges has been created by the folding of the earth’s crust.
18. Someone standing on the peak of Mount Washington, in New Hampshire, are on one of the windiest spots on earth.
19. A storm with circulating wind speeds of 73 mph or more are called a hurricane in the Atlantic, a typhoon in the western Pacific, and a cyclone in the Indian ocean.
20. Some of President Gerald Ford’s earlier jobs was as a park ranger at Yellowstone and as a model for sports clothes in Life magazine.
