The whale shark is the largest fish alive today. It can grow up to 18 meters long. That is about 1,800 times longer than the smallest fish...
1 D
The whale shark is the largest fish alive today. It can grow up to 18 meters long. That is about 1,800 times longer than the smallest fish, Paedocypris progenetica, whose maximum length is only about 10 millimeters.
2 D
Camels have a reputation for being desert animals, and some are able to exist in both extremes of temperature. Bactrian camels (the two-humped variety) have adapted to the tremendous heat of China’s Gobi Desert as well as the bitter cold of the Mongolian steppes.
3 B
On average, the tiny frog Paedophryne amauensis measures only 7.7 millimeters long.
4 C
Thanks to a slow metabolism adapted to the cold deep waters it inhabits, the Greenland shark is thought to be able to live up to 500 years.
5 A
Rattlesnake skin contains keratin, the same protein that makes human fingernails. Each time a rattlesnake sheds its skin, keratin collects at the tip of the tail, growing the rattle.
6 A
Peregrine falcons catch their prey by flying high and diving down at incredible speeds. Cheetahs, by comparison, can sprint about 71 miles per hour.
7 D
Flamingos get their pink (or red or orange) colour from carotenoids, pigments found in the algae, larvae, and shrimp that they eat.
8 C
Hyenas produce a high-pitched series of short giggle-like sounds when threatened or frustrated. When another clan member tries to steal its food, the pitch of a hyena’s giggle can indicate age and social status.
9 A
Prairie dogs are actually a type of squirrel, not canine. Many different extended families of prairie dogs live together in the same ‘town’, usually about 247 acres (0.4 square mile) in size. An estimated 400 million prairie dogs lived in the record-setting colony discovered in Texas.
10 D
A South Carolina Border Collie named Chaser earned worldwide fame for being able to recognize and react to 1,022 different nouns.
