The 47% budget cut would obliterate NASA's science program, experts say.

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The aerospace giant says it can revive Mars Sample Return with a leaner, lower-cost approach drawing on proven designs.

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With a name like Mister Terrific, you better believe this mysterious masked man has a big reputation to live up to!

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For one, scientists observe a "cosmic fossil" called the cosmic microwave background (CMB). The first light that was free to ...

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"Theories involving substantial formation of stars prior to or together with the black hole formation and growth are very ...