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How to Maintain a Furnace

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Heating systems are usually trouble-free and easy to maintain. Efficient operation is a function of good maintenance. Learn how to maintain a furnace.

¿Puedes nombrar estos programas de los 60 y de los 70 a partir de una imagen?

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¿Te consideras un teleadicto de la TV mexicana? En las décadas de los 60 y los 70, la televisión mexicana presentó una gran variedad de programas memorables que fueron un deleite para mucha gente. Si te mostramos solo una imagen, ¿crees que puedas reconocerlos?

10 Surprising Facts About Astronaut Training

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NASA astronauts have to undergo serious training before becoming approved for a trip to space. But some of that training is certainly not what you'd expect.

How Whales Work

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Whales are some of the largest living things on the planet. Learn about whales and find out how whales are able to sleep and withstand the pressures of the ocean.

How Sci-fi Doesn't Work

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Learn how sci-fi doesn't work in some popular movies and TV shows.

How Juggling Works

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Juggling involves the repeated tossing and catching of three or more objects. Find out how juggling works and learn how to juggle multiple objects.

1968-1969 Oldsmobile Hurst/Olds

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The 1968-1969 Oldsmobile Hurst/Olds had a bigger engine than GM allowed at the time. Check out the 1968-1969 Oldsmobile Hurst/Olds and see pictures.

Compression Ratio and Octane Ratings: What You Need to Know

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How do octane ratings and compression ratios relate to each other? Get all the details at HowStuffWorks Auto.

Why Breathing Through Your Nose Is Best

health.howstuffworks.com/human-body/systems/respiratory/nose-breathing.htm

We've probably all been breathing wrong our entire lives. Why is that? Experts suggest we should focus on breathing through our noses and most of us don't.

Spinosaurus Was a Good Floater but Lousy Swimmer

animals.howstuffworks.com/dinosaurs/spinosaurus-was-lousy-swimmer.htm

The villainous dinosaur from 'Jurassic Park' probably never had an affinity for water.

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