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Can a planet float on water?

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The floating planet theory states that a planet that is light enough should be able to float on water. Learn about the floating planet theory.

Time May Not Exist, Say Some Physicists and Philosophers

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The answer to the question "Does time exist?" may seem obvious, but is it? And what if time doesn't exist, but is merely a human construct?

Muons: The Subatomic Particles Shaking Up the World of Physics

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First discovered in the late 1930s, muons are passing through you and everything around you at a speed close to light, as cosmic rays strike particles in our planet's atmosphere. So what are muons and how are they informing the new physics?

Paintings by Georges Seurat

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Georges Seurat's pioneering, structural approach to painting came to be known as Neo-Impressionism. Learn about the life and career of Georges Seurat.

What is gravity?

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What is gravity? How does gravity affect virtually everything on Earth? Learn about gravity in this article from HowStuffWorks.

What would nuclear winter be like?

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If the sight of a mushroom cloud burning above the horizon suggests that the nuclear weapon-equipped world might end with a bang, then nuclear winter presents the notion that post-World War III humanity might very well die with a whimper.

Nebular Theory Might Explain How Our Solar System Formed

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The nebular theory, also known as nebular hypothesis, presents one explanation of how the solar system was formed, proposed by Pierre Simon de Laplace in 1796.

What is supersymmetry?

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Supersymmetry just might explain how the tiniest parts of the cosmos work. Learn more about what supersymmetry is at HowStuffWorks.

How super are superconductors?

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In physics, you can’t get something for nothing, but superconductors offer the hope of someday breaking even. Getting them to live up to their potential has given scientists more than a few headaches in the years since they were discovered. Let’s see how much you know about these wonders of electromagnetism.

Prokaryotic vs. Eukaryotic Cells: What's the Difference?

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Prokaryotic cells are like single-room efficiency apartments while eukaryotic cells are like mansions with many rooms — and they are the only two kinds of cells in the world.

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