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The Secrets of Airline Travel Quiz

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Air travel is far more than getting from point A to point B safely. How much do you know about the million little details that go into flying on airplanes?

Why Do Bubbles Pop?

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All bubbles pop - that's a fact of life. But what's the science behind the short life and inevitable pop of a bubble?

Can You Crack This Nuts Quiz?

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Time to get nutty! How much do you know about all of the different types of nuts out there? Take this quiz and find out!

The Zoo Hypothesis: Are Aliens Watching Us Like Animals in a Zoo?

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Is it possible that we are not alone in the universe, but are just like animals in a zoo to the aliens who are watching us?

How Dangerous Is Wildfire Smoke? A Toxicologist Is Raising Red Flags

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The effects of wildfire smoke are different than those of other types of air pollution. But just how harmful to humans is it?

Twinkle, Twinkle: The Ultimate Stars Quiz

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Stars are giant nuclear fusion reactors, and we wouldn't exist without them. Find out how much you know about these twinkling lights with our quiz.

Who Named Planet Earth?

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All of the planets in the solar system are named for Greek gods, except Earth. So where did the name come from?

What Really Happened to Yuri Gagarin, the First Man in Space?

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He stood just 5 feet, 2 inches. But Gagarin cast an enormously long shadow in space exploration, both for his achievements and his mysterious death.

Velociraptor Alert: The Feathered Dinosaur Quiz

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Test your knowledge of the fluffy, winged dinos of the bygone Mesozoic era, from little Microraptor to the enormous Yutyrannus with this quiz.

Quiz: Can You Tell Climate Change Fact From Fiction?

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Think you can tell the facts from myths of climate change? Find out with this HowStuffWorks quiz.