Cuisine varies greatly around the world, but the basic ingredients that sustain humans are pretty similar. We eat a lot of corn, wheat, rice and other simple crops. Read on to find out which foods top the list of most important worldwide, listed by annual production and average yield in 2008.
Howler monkeys are widely considered to be the loudest land animal. According to Guinness Book of World Records, their vocalizations can be heard clearly for 3 mi (4.8 km). The function of howling is thought to relate to intergroup spacing and territory protection, as well as possibly to mate-guarding.
The cheetah is the world's fastest land mammal. It can run at speeds of up to 70 miles an hour (113 kilometers an hour). Cheetahs do not roar, as the other big cats do. Instead, they purr. In one stride, a cheetah can cover 23 to 26 feet. In the wild, lions live for an average of 12 years and up to 16 years. They live up to 25 years in captivity. An adult lion's roar can be heard up to five miles away.