1. Madrid, Spain
   New York, New York
2. Budapest, Hungary
   Paris, France

"La Tour Eiffel," as it's known in French, was constructed in 1889 for the World's Fair, and it has graced Paris' landscape ever since. At the time, it was the tallest structure in the world, standing almost one thousand feet tall.

1. North
   South
2. East
   West

If you ever need to figure out which way is north, all you have to do is watch the sun. Its position actually comes from the Earth's rotation, not the sun's movement, but this memory device is still a great way to keep your directions straight.

1. "Gone with the Wind"
   "The Wizard of Oz"
2. "It's a Wonderful Life"
   "Singin' in the Rain"

Dorothy and Toto are the stars of "The Wizard of Oz," which came out in 1939. As Dorothy and Toto follow the yellow brick road, they meet the Lion without courage, the Tin Man without a heart, and the Scarecrow without a brain.

1. Cartilage
   Chitin
2. Muscle
   Cells

Cell theory states that all living things are made of cells, so for something to be alive, it must consist of at least one cell. Bacteria are a great example of single-celled organisms considered to be alive.

1. Flour
   Sugar
2. Eggs
   Yeast

Yeast consume some of the sugar used in baked goods, along with oxygen, releasing carbon dioxide in the process. These bubbles try to rise to the surface, causing the food to rise with it.

1. Whale
   Shark
2. Squid
   Clownfish

Whales need to surface regularly in order to breathe air; that's why you can see their spout above water. They clear air out of their lungs, creating a gush of water vapor, then they take in as much air as they can before submerging again.

1. Zucchini
   Broccoli
2. Cucumber
   Carrot

Cucumbers are submerged in brine to create pickles - in other words, pickles are just pickled cucumbers! Of course, other veggies can be pickled, but they're never referred to as just "pickles."

1. Yellow
   Blue
2. Orange
   Red

Spanish toreadors wave red capes to enrage bulls, but bulls are actually colorblind. They're attracted to motion, not to color.

1. Tiger
   Human
2. Chimpanzee
   Ant

Ants can lift up to 50 times their body weight, but that's not even the most impressive weightlifting feat in the animal kingdom. Mites can lift up to 1,180 times their weight, an unimaginable accomplishment!

1. Beta-carotene
   Phylloquinone
2. Biotin
   Potassium

Beta-carotene, a great source of Vitamin A, gives carrots their bright orange color. It's also the reason that beets are purple and apricots are, well, apricot.

1. George Washington
   John Adams
2. Alexander Hamilton
   Woodrow Wilson

After George Washington declined a third term as president, John Adams took his place in 1797. While in the White House, Adams famously wrote, "May none but honest and wise men ever rule under this roof."

1. Spider-Man
   Popeye
2. Pink Panther
   Donald Duck

"Popeye the Sailor Man" got his start in newspapers and was inspired on a real person named Frank "Rocky" Fiegel who also smoked a pipe and was toothless. Popeye was so popular that American children's third-favorite food was - believe it or not - canned spinach.

1. AB+
   B-
2. A+
   O-

People with O- blood don't produce any surface proteins that would be recognized and attacked by the recipient's immune system. AB folks, on the other hand, can receive any type of blood transfusion because their bodies already produce any surface proteins that could be a problem.

1. Glass
   Metal
2. Plastic
   Charcoal

Before glass bottles, if you wanted milk, you had to carry your pail to the farmer to get it! At first, many businesses were worried about the glass bottles breaking, but after a while the government mandated glass delivery.

1. Frank Sinatra
   Elvis
2. Nat King Cole
   Frankie Valli

Frank Sinatra was a classic triple-threat, thrilling audiences with his singing, dancing and acting. An Oscar and Grammy winner, he created art that is still appreciated today.

1. Tiger
   Statue of Liberty
2. Bald eagle
   Stars and stripes

A common myth exists that Benjamin Franklin desperately wanted a turkey to be on the emblem instead of a bald eagle. In reality, he commented in a letter to his daughter that the drawing of an eagle looked more like a turkey.

1. Toaster
   Bug
2. Alien
   UFO

Aliens, or extraterrestrial life forms, have captured our imaginations for centuries. In sci-fi movies, they're often seen flying around in unidentified foreign objects, aka UFOs.

1. Cake
   Biscuit
2. Kolache
   Pastry

The Latin words from which the word "biscuit" is derived translate to "twice cooked." A British biscuit is like an American cookie -- especially the crispier ones.

1. Russia
   Britain
2. China
   USA

American astronauts set foot on the moon's soil first, but the Russians were the first to land any object -- Luna 2 -- on the moon.

1. Twins
   Triplets
2. Quadruplets
   Quintuplets

The record for the most births from a single human pregnancy is eight. In 2009, "Octomom" Nadya Suleman birthed octuplets (the result of IVF and medical malpractice).

1. Ice
   Salt
2. Milk
   Vanilla

You can't have ice cream without milk in some shape or form. Traditionally, ice cream is made with cow's milk, but it can also be made with coconut milk or soy, for those with allergies to dairy.

1. Incisor
   Enamel
2. Molar
   Canine

Incisors, molars, premolars and canines are the different types of teeth you'll find in your mouth. Teeth are coated with enamel, a hard substance made of calcium phosphate.

1. Turtle's back
   Flat
2. Sphere
   Elliptical plane

From the behavior of the stars to the pictures from NASA, we have all the evidence we need to know that the Earth is round. Fun fact: gravity as we know it wouldn't exist if the Earth were not a massive sphere.

1. Danke
   Bitte
2. Gute Nacht
   Gesundheit

"Danke" means "thank you," "bitte" means "please" or "you're welcome," and "gute nacht" means "good night." Then there is "Gesundheit," which actually means "health," but it's commonly used at moments when English-speakers say "bless you" - following a sneeze.

1. The end of a cigarette
   The shoulder stock of a rifle
2. An archery target
   All of the above

Merriam-Webster lists several entries for the word "butt," including both nouns and verbs. It has a history of wide and varied use outside the colloquial American term, referring to one's underside.

1. Water
   Alcohol
2. Benzene
   Mercury

Mercury thermometers provided a more accurate measurement of temperature than alcohol thermometers, but they posed a substantial health risk if they were to break. They were finally discontinued even for industrial use in 2011.

1. Slug
   Bear
2. Bunny
   Bull

A "bear market" is one that is trending downward, in the same way that a bear would attack by swiping its paw down. A "bull market" is one trending upward, just like a bull would raise its horns high.

1. Zeus
   Achilles
2. Athena
   Hermes

Athena was said to have beaten Poseidon, the god of the sea, for patronage over the town by offering its residents an olive tree. As the goddess of wisdom, she saw the many benefits they would enjoy from olives.

1. Europe
   North America
2. Asia
   Africa

Serengeti National Park, located in Tanzania, is home to wildlife such as zebras and wildebeests. The name loosely translates to "endless plains" in Maasai, the language of the indigenous people.

1. Michael Dell
   Mark Wahlberg
2. Mark Zuckerberg
   Steve Jobs

Steve Jobs was a co-founder of Apple, along with Steve Wozniak. Jobs, who lived from 1955 to 2011, created quite a few jobs with his company. An adopted child, he spent several years finding his direction before creating the company in 1976.

1. WWI
   Vietnam War
2. Cold War
   Iraq war

Originally, the internet was used as an information "weapon" in the Cold War. Over time, it developed into the giant "interconnected network" it is today!

1. Brachiosaurus
   Iguanadon
2. Tyrannosaurus Rex
   Stegosaurus

The brachiosaurus stood approximately 40 or 50 feet tall, and scientists thought at first that it was aquatic because of its great mass and nostril placement. It is now thought to have been a land dweller, but how it supported its weight is something of a mystery.

1. Jupiter
   Earth
2. Venus
   Mars

The planets, from closest to furthest from the sun are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Pluto was demoted from "planet" to "dwarf planet" and is no longer included in our solar system's planet count.

1. Red
   Green
2. Blue
   Yellow

Red, blue and yellow can be mixed to make other colors, but you can't mix other colors to make red, blue or yellow. They're called "primary" because you have to start with them to get everything else.

1. Caterpillar
   Tick
2. Spider
   Butterfly

Spiders crawl around on eight legs, butterflies have six. Ticks have six legs in the larval stage, then later, as adults, they have eight.