There are a lot of unsolved mysteries in the Universe, but dark energy is the most confusing. Here’s why.
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On the 100th anniversary of Albert Einstein's Theory of General Relativity (gravity), many of the predictions of this theory have been proven correct. Here's the story of one that was wrong.
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Astrobiologists debate which chemical signatures would hint at life on other worlds.
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What we do and don’t know about baby galaxies and how they're born.
MIT scientists trace 13 billion years of galaxy evolution, from shortly after the Big Bang to the present day. Their simulation, named Illustris, captures both the massive scale of the Universe and the intriguing variety of galaxies -- something previous modelers have struggled to do. It produces a Universe that looks remarkably similar to what we see through our telescopes, giving us greater confidence in our understanding of the Universe, from the laws of physics to our theories about galaxy formation.
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