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Read article: Blazars help measure extragalactic background light Telescopes and space missions Research update Blazars help measure extragalactic background light New method looks at attenuated high-energy gamma rays
Read article: Why some galaxies age before their time Telescopes and space missions Research update Why some galaxies age before their time Ancient collision could explain why some young galaxies look old
Read article: What is M-theory? Quantum mechanics Video What is M-theory? Leron Borsten on how M-theory could be the one theory to rule them all
Read article: What is quantum gravity? Quantum mechanics Video What is quantum gravity? Leron Borsten explains why general relativity and quantum mechanics are mutually incompatible
Read article: What is cosmic inflation? Gravity Video What is cosmic inflation? Andrew Jaffe explains how the universe underwent a flash of enormous growth when it was just fractions of a second old
Read article: Will the universe go on expanding forever? Cosmology Video Will the universe go on expanding forever? Daniel Mortlock gives his informed opinion on the ultimate fate of the universe