1. In 1889, the Queen of Italy, Margherita Savoy, ordered the first pizza delivery.
2. You can buy eel flavored ice cream in Japan.
3. It's considered rude to write in red ink in Portugal.
4. Although the bobcat is rarely seen, it is the most common wildcat in North America
5. A cat's tail contains nearly 10 percent of all the bones in its body.
6. Gecko feet have millions of tiny hairs that stick to surfaces with a special chemical bond and let them climb walls and hang on by just one toe.
7. The term "astronaut" comes from Greek words that mean "star" and "sailor."
8. The calcium in our bones and the iron in our blood come from ancient explosions of giant stars.
9. The Nile crocodile can hold its breath underwater for up to 2 hours while waiting for prey.
10. Jellyfish, or jellies as scientists call them, are not fish. They have no brain, no heart, and no bones.
11. The Chinese giant salamander can grow to be 6 feet (1.8 m) long, making it the largest salamander in the world.
12. Scientists say that the best time to take a nap is between 1 p.m. and 2:30 p.m. because that's when a dip in body temperature makes us feel sleepy.
13. Because the speed of Earth's rotation changes over time, a day in the age of dinosaurs was just 23 hours long.
14. Hummingbirds' wings can beat 200 times a second.
15. A seahorse can move its eyes in opposite directions—all the better to scan the water for food and predators.
16. It would take 100 Earths, lined up end-to-end, to stretch across the face of the sun.
17. Corn is grown on every continent except Antarctica.
18. You lose about 50 to 100 hairs a day.
19. The world's smallest fruit—a utricle—is the size of a small ant.
20. Not all moons are dry and dusty like ours. Jupiter's Europa has a liquid ocean under an icy crust.
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