When the first prototype of Apple’s iPod was shown to Steve Jobs, he dropped it in an aquarium and used the air bubbles to prove there was empty space and it could be made smaller.

Espresso has more caffeine per unit volume than most coffee beverages, but because the usual serving size is much smaller, the total caffeine content is less than a mug of standard brewed coffee.

These social animals cooperate on their preferred prey. A single wolf is capable of catching and killing a deer unaided but when hunting as a pack it preys on much larger animals such as deer, elk, and moose. Wolves also eat smaller mammals, birds, fish, lizards, snakes, and fruit.

Wolves are highly territorial animals, and generally establish territories far larger than they require to survive; in order to assure a steady supply of prey. Territory size depends largely on the amount of prey available: in areas with an abundance of prey, the territories of resident wolf packs are smaller.

Cheetahs are carnivores, and feed mostly on smaller antelope like springbok, steenbok, Thomson’s gazelle, and duiker. They usually chase down their prey and then bite its throat, killing it by cutting off its air supply (suffocation).