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Why Are Planets Almost Spherical?
science.howstuffworks.com/why-are-planets-almost-spherical.htm
None of the planets in our solar system are perfect spheres, nor for that matter is our sun. Learn more about oblate spheroids at HowStuffWorks.
How the Sun Works
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The sun warms our planet every day, provides the light by which we see and is necessary for life on Earth. Learn about the sun.
Venus: Earth's Blazing-hot and Bizarre Twin
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The atmosphere is crushing on Venus, and it's so hot lead would melt. But the planet still has a lot in common with Earth. We'll explain.
Earth: A Primer on the Third Rock From the Sun
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Earth is an enormous and extremely complex planet. Learn about the inner workings of the planet Earth and find out what forces are constantly at work on Earth.
How did ancient civilizations use sundials to tell time?
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Ancient sundials first popped up in Egypt around 1500 B.C. Learn how these sundials came about and what they were used for all those centuries ago.
'Tis the Season: 'The Santa Clause' Quiz
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In "The Santa Clause," an ordinary advertising exec unwittingly takes on the role of Kris Kringle. Take our quiz to test your knowledge of this holiday comedy classic.
How Laser Weapons Work
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Laser weapons have been depicted in science fiction for years, but they do exist in real life. Learn more about laser weapons.
What Is the Arctic Circle? 9 Stone-cold Facts About the Region
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The Arctic Circle is a region marked by frigid temperatures, strange sunlight and glaciers galore. And for hundreds of thousands of people, it's also home sweet home.
Nature Garden Activities for Kids
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Nature garden activities for kids teach about nature. Plant a box garden, build a pumpkin tunnel, or grow carrots with nature garden activities.
How Telescopes Work
science.howstuffworks.com/telescope.htm
For centuries, curious observers have probed the heavens with the aid of telescopes. Today, both amateur and professional scopes magnify images in a variety of ways.