Search Results | human population
Your search for "human population" returned 1,378 results
Why do small changes in Earth's temperature have a big impact?
science.howstuffworks.com/environmental/green-science/changes-earth-temperature-impact.htm
Though not everyone agrees why the Earth is getting warmer, temperatures are inching up worldwide. A couple of degrees doesn't seem like such a big deal. What difference can a subtle change make?
What's Better to Buy, Organic Eggs or Cage-free Eggs?
recipes.howstuffworks.com/organic-or-cage-free-eggs.htm
Organic eggs or cage-free eggs - which is better for you and the environment? Learn what's better to buy, organic or cage-free eggs in this article.
If you have HIV, does it mean you have AIDS, too?
health.howstuffworks.com/diseases-conditions/infectious/question709.htm
A friend of mine told me that just because you have HIV doesn't mean you have AIDS. Is this true?
What Exactly Is Mensa? How Smart Do You Have to Be to Join?
people.howstuffworks.com/question661.htm
What exactly is Mensa? How smart do you have to be to join?
Do Fish Sleep? They Have to ... Right?
animals.howstuffworks.com/fish/do-fish-sleep.htm
It's hard to imagine Nemo catching some z's in the Great Barrier Reef. But fish do need rest. Do they sleep like we do?
Anyone With the Most Basic Geographic Knowledge Should Get 19/26 on This Quiz
Mountains, rivers, country borders ... How well do you know the globe? This quiz will test your knowledge of basic world geography - start scrolling and see if you can get your bearings!
Can You Identify These Countries of Oceania From Just a Map Outline?
play.howstuffworks.com/quiz/can-you-identify-these-countries-of-oceania-from-just-a-map-outline
They're beautiful, remote and often not as famous as they deserve! How well would you recognize these gorgeous island nations just based on their silhouettes? It's the ultimate Oceania challenge!
How did 168 conquistadors take down the Incan empire?
history.howstuffworks.com/history-vs-myth/conquistador-incan-empire.htm
The Incan empire was erased from existence by fewer than 200 men, but how was this possible? Find out how the Incan empire was brought down.
Can You Name All the Countries in the Northern Hemisphere?
play.howstuffworks.com/quiz/can-you-name-all-the-countries-in-the-northern-hemisphere
Even if Wacko's song of the countries is a little outdated, he might be able to pass this quiz. Do you think you have the northern knowledge to beat him?
The Ancient Mayfly Briefly Lives Only to Reproduce and DieÂ
animals.howstuffworks.com/insects/mayfly.htm
Mayflies have the shortest adult life span of any animal, but swarms of them can still be seen on weather radar.