Search Results | human population
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How Ozone Pollution Works
science.howstuffworks.com/environmental/green-science/ozone-pollution.htm
We want the ozone layer, but we don't want ozone pollution... Good in the atmosphere but bad on the ground? Find out about ozone pollution, how it affects you and what you can do about it.
All About the World Wildlife Fund
animals.howstuffworks.com/endangered-species/world-wildlife-fund.htm
The World Wildlife Fund works to protect wildlife and their habitats all over the globe. Learn about the World Wildlife Fund organization.
This Cattle Breed Identification Quiz Is Really Hard, So We'll Be Impressed If You Even Get Four Right
Most people don't give cattle a second thought, so long as they have access to milk and hamburgers. But if you fancy yourself a real cowboy or cowgirl, maybe a cowperson, then let's see how many you can identify! No bull, just a quiz!
What Causes Tornadoes? How Tornadoes Work
science.howstuffworks.com/nature/climate-weather/storms/tornado.htm
Tornadoes leave destruction in their wake. Learn why tornadoes rotate, how experts rate tornadoes and view pictures of damage caused by tornadoes.
Why Did England and Spain Fight Over an Ear?
history.howstuffworks.com/history-vs-myth/jenkins-ear.htm
Jenkins' ear -- the severed ear of Capt. Robert Jenkins -- inspired a war. Learn how Robert Jenkins' ear led to a clash of monarchies in the 18th century.
How Zombies Work
science.howstuffworks.com/science-vs-myth/strange-creatures/zombie.htm
Even if you've never seen a zombie movie, you probably know something about the walking dead. But did you know that zombies have their roots in folklore and -- according to some researchers -- in real events in Haiti?
Aztec Achievements: Crafting a Legacy of Innovation
science.howstuffworks.com/innovation/inventions/5-ancient-aztec-inventions.htm
The Aztecs, often associated with warfare and elaborate rituals, gave birth to a sophisticated system of government, remarkable artistic endeavors and a resilient language. Let's dive deeper into their remarkable contributions.
Europe After World War I: November 1918-August 1931
history.howstuffworks.com/historical-events/europe-after-world-war-1.htm
World War I, also known as the Great War, left Germany and other countries humiliated and angry. Learn about events that led to World War II.
How the Stanford Prison Experiment Worked
science.howstuffworks.com/innovation/scientific-experiments/stanford-prison-experiment.htm
The Stanford Prison Experiment is one of the most well-known psychological studies, infamous for the participants' cruel behavior. But the whole story of the study is much more complex.
How Earthquakes Work
science.howstuffworks.com/nature/natural-disasters/earthquake.htm
An earthquake is one of the most terrifying phenomena that nature can dish up. We generally think of the ground we stand on as "rock-solid" and completely stable. An earthquake can shatter that perception instantly, and often with extreme violence.