Protons and neutrons are composite structures: made of quarks and gluons. But knowing they had substructure goes back long before that.…
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In 2016, humanity announced our first successful gravitational wave detection. 10 years and 389 events later, here’s how far we’ve come.…
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Two discrete symmetries, charge conjugation and parity, must be violated together for our Universe to exist. We haven’t found enough of…
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Despite all that we’ve discovered, Earth remains the only planet definitively known to possess life. Here’s how to find a second…
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At and beyond the current frontiers of knowledge, many physicists have strongly held opinions. Can surveys point the way to breakthroughs?…
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The original idea of the Big Bang was synonymous with a singularity: a point of zero volume. In this Universe, things…
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Light pollution now steals a pristine night sky from the majority of humanity. The rise of LED lighting, primarily since 2014,…
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Today, in the here-and-now, a full 13.8 billion years have elapsed since the start of the hot Big Bang. But would…
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A relatively tiny world in the Kuiper belt, just 500 km in diameter, has an atmosphere after all, joining Pluto. Here’s…
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Triton is Neptune’s largest moon today, but it was once the undisputed king of the Kuiper belt. Here’s why the outer…