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The 9 Longest Rivers in the World: From the Nile to the Congo
science.howstuffworks.com/environmental/earth/geophysics/9-longest-rivers-in-world.htm
When it comes to rivers, longest doesn't necessarily mean biggest, and length can be difficult to determine, so the top spot will always be debated.
The World's 'Poles of Inaccessibility' Are, Well, Pretty Inaccessible
science.howstuffworks.com/environmental/earth/geophysics/poles-of-inaccessibility.htm
The Poles of Inaccessibility are the locations on Earth that are the farthest away from either water or land and are the most remote spots in the world.
What If an Asteroid Hit Earth?
science.howstuffworks.com/nature/natural-disasters/asteroid-hits-earth.htm
There are obvious craters on Earth (and the moon) that are evidence of a long history of massive objects hitting planet Earth. But what would happen if an asteroid hit Earth today?
How do plug-in hybrids' mileage compare to other cars?
auto.howstuffworks.com/car-models/plug-in-hybrids/plug-in-hybrids-mileage.htm
How do plug-in hybrids' mileage compare to other cars? Find out how much gas plug-in hybrids use compared to other cars.
What's the Fastest Car in the World?
auto.howstuffworks.com/under-the-hood/trends-innovations/fastest-car-in-world.htm
If your car is built like a supersonic plane, you can sure reach blazing fast speeds. But what about a car you can actually buy?
Why Did the Russians Seal Up the Deepest Hole in the World?
science.howstuffworks.com/engineering/civil/kola-superdeep-borehole.htm
The Kola Superdeep Borehole in Russia is the deepest hole in the world. It's deeper than the Mariana Trench and deeper than Mt. Everest is tall. Why did the Russians dig this deep, and why did they stop?
What Are the 10 Biggest Airports in the World?
science.howstuffworks.com/transport/flight/modern/biggest-airport-in-world.htm
Ever sprinted through one of these behemoth airports desperate to make a flight? Here are the world's seven largest airports, not by passenger volume, but by sheer size alone.
Ever Driven Any of the 9 Longest Roads in the World?
science.howstuffworks.com/engineering/civil/longest-roads-in-world.htm
The U.S. has some of the longest highways in the world, but the nine longest are scattered all over the globe.
5 Crossover Vehicles with the Best Fuel Economy
auto.howstuffworks.com/car-models/crossover-cars/5-crossover-vehicles-with-the-best-fuel-economy.htm
Which crossover vehicles are most fuel-efficient? Read about the 5 crossover vehicles with the best fuel economy at HowStuffWorks.
How Long Does a Clutch Last?
auto.howstuffworks.com/under-the-hood/car-part-longevity/clutch-last.htm
How long does a clutch last? Visit HowStuffWorks to learn how long a clutch lasts.