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What Is the Largest City in the World by Population?
people.howstuffworks.com/culture-traditions/cultural-traditions/largest-cities-in-world.htm
Of the 8 billion people now inhabiting this planet, almost 60 percent live in urban environments in some pretty densely packed cities. Here are the top 10 megacities in the world.
What's the Biggest State in the U.S.A.?
science.howstuffworks.com/environmental/earth/geophysics/biggest-state-in-usa.htm
The United States is divided into 50 states, small and large. So which is the biggest state in the U.S.A.?
20 Black and White Birds and Where to Spot Them
animals.howstuffworks.com/birds/black-and-white-birds.htm
Black and white birds may not be as vibrant as bright-colored birds, but in many parts of the world, birds such as magpies symbolize luck, intelligence or mystery. Black-and-white seabirds such as penguins and razorbills have also become icons of climate change awareness.
How the Ozone Layer Works
science.howstuffworks.com/environmental/green-science/ozone-layer.htm
We hear about the ozone layer all the time. But, what is the ozone layer and what are the ozone layer's components?
How Virgin Galactic Works
science.howstuffworks.com/virgin-galactic.htm
Virgin Galactic is the first commercial space tourism company, offering flights to space. Read about Virgin Galactic.
10 Active Senior Hobbies
health.howstuffworks.com/wellness/aging/senior-health-lifestyle/10-active-senior-hobbies.htm
Active senior hobbies can help maintain fitness and health. See this list of 10 active senior hobbies to get inspired.
How Leper Colonies (Leprosaria) Work
health.howstuffworks.com/diseases-conditions/infectious/leper-colonies.htm
Leprosy, or Hansen's disease, was the AIDS of the first millennium. Find out how leper colonies (leprosaria) worked at HowStuffWorks.
Can someone own the moon?
science.howstuffworks.com/own-the-moon.htm
Can someone own the moon? Learn all about real estate on the moon what it takes to get your own lunar property.
10 Cool Things About Neil deGrasse Tyson
He starred with Superman, drove the getaway car at Pluto's demise and was voted sexiest astrophysicist by People magazine. Is there anything Neil deGrasse Tyson can't do?
What do most sharks eat?
animals.howstuffworks.com/fish/sharks/shark-diet.htm
What do sharks eat? Sharks range in size from 8 inches long to 60 feet long. So obviously their diets vary. Learn more about what sharks eat.