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[:es]What Might Be Speeding Up the Universe’s Expansion?[:]

[:es]Physicists have proposed extra cosmic ingredients that could explain the faster-than-expected expansion of space. [:]
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[:es]Why Sex? Biologists Find New Explanations[:]

[:es]Why did sex evolve? Theories usually focus on the diversity of future generations, but some researchers find compelling explanations in the immediate benefits to individuals.[:]
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[:es]Why Are Black Holes So Bright?[:]

[:es]And why is the black hole at the center of our own galaxy so dim?[:]
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[:es]Some Animals Have No Microbiome. Here’s What That Tells Us.[:]

[:es]To stay healthy, humans and some other animals rely on a complex community of bacteria in their guts. But research is starting to show that those partnerships might be more […]
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[:es]Where Do New Genes Come From?[:]

[:es]In their search for sources of genetic novelty, researchers find that some “orphan genes” with no obvious ancestors evolve out of junk DNA, contrary to old assumptions.[:]
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[:es]To Make the Perfect Mirror, Physicists Confront the Mystery of Glass[:]

[:es]Sometimes a mirror that reflects 99.9999% of light isn’t good enough.[:]
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[:es]Mathematics as a Team Sport[:]

[:es]When 50 mathematicians spend a week in the woods, there’s no telling what will happen. And that’s the point.[:]
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[:es]Why Do Matter Particles Come in Threes? A Physics Titan Weighs In.[:]

[:es]Three progressively heavier copies of each type of matter particle exist, and no one knows why. A new paper by Steven Weinberg takes a stab at explaining the pattern.[:]
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[:es]Billion-Year-Old Algae and Newer Genes Hint at Land Plants’ Origin[:]

[:es]A recently unearthed fossil and new genomic discoveries are filling important gaps in scientists’ understanding of how primitive green algae eventually evolved into land vegetation.[:]