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Earth's 20 Quadrillion Ants Outweigh All Wild Birds and Mammals, Combined

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Estimating ant numbers and mass provides an important baseline from which to monitor ant populations amid worrying environmental changes.

Top 10 Space Conspiracy Theories

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Space conspiracy theories feature hoaxes, government cover-ups and intelligent aliens. Check out our list of the top 10 space conspiracy theories.

10 Alternative Fuel Ideas That Never Made It Out of the Lab

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You might be surprised by some of the alternative fuel solutions mentioned in this article. Read about ten somewhat odd alternative fuel solutions.

Evolution by Natural Selection: Examples and Effects of Adaptation

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Natural selection is the idea that organisms that are best suited to survive pass their traits down. Is it true that only the strong survive?

How Greenhouses Work

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Reproducing plants out of season gave man a measure of control over nature. The allure of it sparked the imagination and inspired new methods for building structures devoted to plants. So how do greenhouses work?

How Driverless Cars Will Work

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Driverless cars could help ease traffic congestion, lower pollution and prevent accidents. Learn more about the technology behind driverless cars.

How Saber-tooth Cats Worked

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Saber-tooth cats are perhaps the most well-known extinct felines. Learn about saber-tooth cats and the behavior patterns of saber-tooth cats.

How Déjà Vu Works

science.howstuffworks.com/science-vs-myth/deja-vu.htm

Déjà vu is the feeling that you have experienced a situation before even though you know you haven't. Learn about déjà vu and theories behind déjà vu.

What Did Isaac Newton Discover? 10 of Sir Isaac Newton's Inventions

science.howstuffworks.com/innovation/famous-inventors/5-isaac-newton-inventions.htm

Almost 300 years after his death, Sir Isaac Newton remains one of the most influential thinkers in history. What are some of his most enduring inventions?

10 Top Tips for Preparing for the MCAT

money.howstuffworks.com/personal-finance/college-planning/admissions/5-tips-mcat.htm

Your whole future balances on acing one test -- but no pressure. We have 10 tips on how to stay calm, make a plan and study effectively for the MCAT.

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