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What makes a cheetah run so fast?
animals.howstuffworks.com/mammals/cheetah-speed.htm
What makes a cheetah run so fast? Learn why a cheetah runs as fast as it does, and find out how cheetah anatomy allows it to reach top speeds.
Jaguar vs. Leopard: Spotting the Similarities and Differences
animals.howstuffworks.com/mammals/jaguar-vs-leopard.htm
When it comes to big cats, jaguar vs. leopard identification can be tricky due to the animals' similar spotted coats. However, these wild cats belong to separate species within the genus Panthera and have distinct differences in appearance, behavior and habitat.
Why do cougars scream?
animals.howstuffworks.com/mammals/cougar-scream.htm
Cougars scream during mating season to attract the opposite sex. Learn how cougars scream and why humans don't hear these cougar screams too often.
Alaska's Kodiak Bear Is One of the Planet's Biggest
animals.howstuffworks.com/mammals/kodiak-bear.htm
Kodiak bears are some of the largest bears in the world and live only in the islands of the Kodiak Archipelago in Alaska.
How Dogs Work
animals.howstuffworks.com/pets/dog.htm
Dogs are actually all one species despite the wide variety of shapes and sizes that make up the family canidae. Learn how dogs evolved from wolves.
Can You Name the Countries for These Mostly Green Flags?
play.howstuffworks.com/quiz/can-you-name-the-countries-for-these-mostly-green-flags
The stars and stripes. The maple leaf. The red ensign. The gold and green. Every country has a flag and every flag has a meaning. Do you think you can ID all these countries that have green flags? Run this quiz up the flagpole, and see who salutes!
Why Just 5% of Americans Account for 50% of U.S. Health Care Spending
health.howstuffworks.com/health-insurance/5-percent-americans-account-50-percent-health-spending.htm
Health care spending in America goes up enormously every year. Yet just a small number of people account for most of the money. Why is this and how can we rein that in?
How much power does the world consume?
science.howstuffworks.com/environmental/green-science/world-power-consumption.htm
World power consumption is dominated by the world's richest countries. Learn about world power consumption and find out how much power the world consumes.
Flesh-eating Screwworm Maggots Are Devouring Rare Tiny Florida Deer Alive
animals.howstuffworks.com/insects/screwworm-florida-key-deer.htm
The flesh-eating screwworm has been found in the Florida Keys. Learn more about screwworms and Key deer in this HowStuffWorks Now article.
Are You a Geography Guru?
play.howstuffworks.com/quiz/are-you-a-geography-guru
The world is a large and expansive place, with lots to know and discover. But just how much do you know about the lay of the land? Fancy yourself a geography guru? If so, take on our challenge to prove it.