Search Results | human population
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Is This Character a Superhero or a Supervillain?
play.howstuffworks.com/quiz/is-this-character-a-superhero-or-a-supervillain
A superhero might walk an old lady across the road while a supervillain will steal her purse when she's looking the other way. Do you know which of these characters fall into each category?
What is China's one-child policy?
people.howstuffworks.com/one-child-policy.htm
What is China's one-child policy? Learn about China's one-child policy, implemented in 1979 to reduce the population and stimulate economic growth.
What Is Deforestation?
science.howstuffworks.com/environmental/green-science/deforestation.htm
Deforestation, or the removal of forests, contributes to global warming. Learn how deforestation harms our plants and animals -- even to extinction.
A Galapagos Tortoise Weighs Almost 1,000 Pounds
animals.howstuffworks.com/reptiles/galapagos-tortoise.htm
The Galapagos tortoise is one of the most iconic reptiles on Earth, and for good reason. These gentle giants are the largest tortoises in the world, living on the Galápagos Islands and playing a key role in their ecosystems.
Exactly what happens if we run out of water?
science.howstuffworks.com/environmental/earth/geophysics/run-out-of-water.htm
On a planet that is 70 percent water, people don't have enough clean, safe water to drink. We're in a water crisis, and water rights are becoming a big issue. What happens if we just plain run out?
10 Oldest Known Diseases
science.howstuffworks.com/life/cellular-microscopic/10-oldest-known-diseases.htm
You won't find some of history's biggest killers on this list, but you will find at least one disease that will make you want to bite something and another that might make you break out in "elevated pustules." Curious yet?
American Crocodile Lives up to 70 Years and Weighs 2,000 lbs
animals.howstuffworks.com/reptiles/american-crocodile.htm
The American crocodile is an amazing animal. Learn about the American crocodile.
The Grass Snake Will Play Dead and Make a Stink About It
animals.howstuffworks.com/snakes/grass-snake.htm
Grass snakes are nonvenomous reptiles with distinctive markings. This common snake plays a crucial role in maintaining healthy ecosystems by controlling amphibian populations and other prey.
What are the world's rarest diseases?
health.howstuffworks.com/diseases-conditions/rare/rare-diseases.htm
The world's rarest diseases may affect few people or may exist solely in a lab. Learn about the world's rarest diseases and what makes a disease rare.
The Destiny Lore Quiz
play.howstuffworks.com/quiz/the-destiny-lore-quiz
In a battle of Light versus Darkness, the last vestiges of humanity against sinister and terrifying forces from all corners of the galaxy, how much of the lore of Destiny do you know? Head to the Last City and take the quiz!