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Why Did the T. Rex Have Such Puny Arms?

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Tyrannosaurus rex was a giant predator that roamed the earth, so why did it have such tiny arms?

How Can Minus 40 Fahrenheit Equal Minus 40 Celsius?

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There are two different scales of measuring temperature on Earth, but they merge at just one very cold number.

Can We Guess Who Your Avengers Crush Is?

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The Avengers aren't just Earth's greatest heroes; they're pretty much Earth's hottest heroes. Also space's hottest heroes, for that matter. Think we can guess your crush? Grab Mjolnir and take the quiz if you're up for it.

If nature abhors a vacuum, then why doesn't the vacuum of space suck away all of the Earth's atmosphere?

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If "nature abhors a vacuum," then why doesn't the vacuum of space suck away all of the Earth's atmosphere?

Meet Gigantophis garstini, an Enormous Prehistoric Snake

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Before the 2003 discovery of Titanoboa cerrejonensis, Gigantophis garstini was known as the largest snake to ever roam the Earth.

How Astronauts Work

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Astronauts are adventurers and scientists who work in space. Learn who astronauts are and what they do in space and on Earth.

What the Stuff?!: 4 Strange and Creepy Islands

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There's nothing cooler than a weird, mysterious island. Here are four of the strangest islands on planet Earth.

10 Wild Facts About the Aye-Aye, a Most Improbable Animal

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This long-fingered primate with the perpetually startled golden eyes is considered one of the most distinctive animals on Earth

Basic World Trivia Quiz

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The Earth has experienced violent destruction that left beautiful scars. Mountains, valleys, islands and rivers paint the planet we know as the Blue Marble. What do you know about the Earth and the world in which we live? Can you pass a basic world trivia quiz?

5 Things You Didn't Know About the Autumnal Equinox

science.howstuffworks.com/environmental/earth/geophysics/5-things-didnt-know-about-autumnal-equinox.htm

The autumnal equinox is the day Earth is perfectly angled to the sun, so the day and night are of equal length. Well, almost.

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