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8 Most Densely Populated Cities in the World
history.howstuffworks.com/world-history/most-densely-populated-city.htm
Statistically, over half of the people reading this article live in a city, with a higher population density than rural or suburban areas. For instance, New York City has nearly 27,000 people crammed into each square mile (2.6 square km) of land.
Arrival of European Breeds Wiped Out Native American Dogs
animals.howstuffworks.com/pets/european-breeds-wiped-out-native-american-dogs.htm
Ancient American dogs were almost completely wiped out when the Europeans arrived. HowStuffWorks looks at the lasting legacy they did leave behind.
How the Cowboy Saddled Up and Rode Into American History
history.howstuffworks.com/american-history/cowboys.htm
Many think of cowboys as part of the American fabric. And they are. But cowboys aren't an American phenomenon and they certainly didn't get their start in the U.S.
Can You Identify These Mountain Animals?
play.howstuffworks.com/quiz/can-you-identify-these-mountain-animals
Mountains cover around 20% of the Earth's surface, and there's a whole lot more life way up there than a few dozen humans seeking climbing glory. Take our quiz to see how many of these mountain-dwelling critters you can name!
Rhodium: Earth's Rarest and Most Expensive Precious Metal
science.howstuffworks.com/rhodium.htm
Discovered in the early 1800s from a chunk of smuggled platinum ore, rhodium is the most valuable precious metal on the planet today, used mainly for keeping car emissions in check.
This Tiny Swift Bird Can Fly for 10 Months Without Landing
animals.howstuffworks.com/birds/common-swift-10-months-flight.htm
Thanks to new technology, researchers have discovered that the common swift flies 10 months a year without landing, setting a world record for uninterrupted time aloft.
What's the Difference Between a Blood Moon and a Lunar Eclipse?
science.howstuffworks.com/blood-moon.htm
Blood moons always bring out the stargazers though they aren't that rare. So what makes blood moons red? And do they differ from lunar eclipses?
How Many Miles Are In 10,000 Steps?
health.howstuffworks.com/wellness/diet-fitness/exercise/how-many-miles-is-10000-steps.htm
We've always heard taking 10,000 steps daily is the key to a healthy lifestyle. So how many miles is in 10,000 steps anyway?
9 Animals That Start With 'V': From Vaquitas to Velvet Ants
animals.howstuffworks.com/animal-facts/animals-that-start-with-v.htm
The animal kingdom is full of surprising creatures, from the tiniest insects to the most endangered marine mammals. Animals that start with "V" include some of the rarest and most interesting. From venomous snakes to eight-armed wonders of the deep, these creatures showcase the incredible variety of life on Earth.
Is Africa Splitting in Two? Really? Here's the Scoop
science.howstuffworks.com/environmental/earth/geology/africa-splitting.htm
The notion of Africa splitting has the attention scientists and geologists worldwide, as the Great Rift Valley stretches and tears at the Earth's crust.