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11) Which dinosaur had the smallest brain for its body size?

The Stegosaurus had the smallest brain for its body size of any known dinosaur. Its body was the size of a van, but its brain was the size of a walnut (about 2.8 oz).

12) What fossil hunter theorized that bezoar stones were fossilized feces?

Mary Anning was an English fossil hunter whose observations played a key role in the discovery that coprolites, known as bezoar stones at the time, were actually fossilized feces.

13) Which of the following dinosaurs was toothless?

The Oviraptor, whose name is Latin for "egg taker", was characterized by its toothless, parrot-like beak.

14) What would a sauropod use gastroliths for?

A gastrolith, also called a stomach stone or gizzard stone, is a rock held inside a gastrointestinal tract and used to grind food in animals lacking suitable grinding teeth. Polished pebbles occasionally found within skeletons of giant herbivorous sauropod dinosaurs are very likely to be gastroliths.

15) What was the first mounted dinosaur skeleton?

In 1868, Hadrosaurus foulkii became the first dinosaur skeleton to ever be mounted. Three stories high, the monstrous animal drew record-breaking crowds at Philadelphia's Academy of Natural Sciences.

16) What was the wingspan of the smallest known pterodactyl?

The smallest known pterodactyl, the Nemicolopterus crypticus (discovered in 2008), had a wingspan of only 10 inches.

17) Which dinosaur was named after a commercial airline?

Qantassaurus was named after the Australian airline Qantas, which helped transport the fossil.

18) How many teeth did the Nigersaurus have?

The Nigersaurus had a wide muzzle filled with more than 500 teeth: 68 columns in the upper jaws and 60 columns in the lower jaws. The front teeth would be worn out in less than a month and replaced, making the Nigersaurus the fastest teeth-replacing dinosaur.

19) What close relative of the Velociraptor could grow up to 7 meters (20 feet) long and weighed almost a ton?

The Utahraptor could grow up to 7 meters (20 feet) long and weigh almost a ton. A close relative of the Velociraptor, this dinosaur was a fierce predator. Like other dromaeosaurids, it had a huge, blade-like claw on its second toe. With this 20 centimeter talon, it is believed that the Utahraptor could make a deep cut 5 to 6 feet long with one swipe, enabling it to kill dinosaurs much larger than itself.

20) What was the first dinosaur to be discovered?

Although there have probably been dinosaur discoveries dating back thousands of years -- there are, for instance, references to "dragon bones" found in ancient China -- the first documented dinosaur discovery took place in 1676 when a jawbone and teeth were unearthed in Oxford, England. In 1824, famed paleontologist William Buckland (1784-1856) finally named this first dinosaur Megalosaurus. Megalosaurus was a large meat-eater that stood up to 9 meters (30 feet) tall and weighed about 1 ton.