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Dr. Alan Guth unveils the theory of inflation.
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Liquid water flows intermittently on the surface of Mars. In those streams, microbial life may have managed to arise.
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Scientists at the National Ignition Facility use lasers to create tiny fusion reactions, like those found in the sun.
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Explore one of the first planets discovered in another star's habitable zone.
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Should our first off-world colony be in orbit, on the moon, or on Mars?
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Even this small asteroid which burned up in the atmosphere still destroyed property and injured 1,500 people.
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Astronomers combine visible light, infrared light, ultraviolet light, X-rays, and radio waves for a dazzling image.
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Black Hole Collisions are the most powerful, violent events in the universe.
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A Dyson sphere is a theoretical mega-structure that could only be built by an advanced civilization. Have astronomers discovered one?
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What's Passing in Front of This Star is Too Big to Be a Planet
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The Arecibo Message was a radio signal sent into space with information about Earth in the hope that alien intelligence could understand it -- and respond.
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Listen to the Message We Sent to Space
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If another civilization built a giant energy collector, we could detect it.
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Before heading into the solar system and beyond, get the latest weather conditions.
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Watch how these trillion-year stars "throw tantrums".
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A Red Dwarf's Mega-Flare is More Powerful Than 100 Million Atomic Bombs
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Astronomers find a pulsar feeding off the gas of a nearby star.
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A "Black Widow" Star is Devouring Its Neighbor
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Jupiter’s Great Red Spot – the largest and longest-running storm in our solar system – is shrinking. Juan Lora, a planetary scientist at UCLA, explains why.
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Saturn Has the Most Powerful Storms in the Solar System
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Evidence suggests that the so called "habitable zone" changes as the Sun ages. Many years ago, Venus may have resembled Earth and been home to life.
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Venus Might Have Been in the Habitable Zone
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Volcanic activity on Io, one of Jupiter’s moons, could be the key to the planet’s extraordinary auroras. Here’s how scientists at Syracuse University in New York have recreated volcanic activity on Io.
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Evidence shows that the Andromeda Galaxy is headed straight for our own. In the next few billion years, the two will collide. The Solar System will most likely be okay though.
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Instead of lava, freezing water is believed to burst from Wright Mons on Pluto.
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Photos from a zone on Mars called the Newton Crater are helping to shed light on the amount of water left on the planet. The moisture left is extremely salty, and possibly toxic to life forms.
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Water on Mars is Incredibly Salty
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Methane is the primary ingredient in many of Saturn's moon's lakes and seas. Scientists designed a submarine that can withstand the volatile chemicals that will be found in these methane lakes.
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Dead stars called magnetars create fast radio bursts, giving us insights into dark matter dark matter.
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Massive Starquakes In Distant Galaxies Can Be Heard On Earth
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A simulation shows how the existence of habitable galaxies depends on dark matter.
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