How rare runaway dead stars are tricky clues for a cosmic mystery

Astronomers call a special kind of supernova a “cosmic yardstick” for good reason: The so-called Type Ia supernova gives off a predictable amount of light, making it a handy tool for measuring distances in space.  These particular supernovas are useful but still puzzling, with scientists still unsure of what triggers their blasts. NASA estimates they…

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What is the dead internet theory?

Exactly three years ago today, Elon Musk tweeted that 90 percent of his tweet replies on what was then called Twitter were bot accounts. His insistence that Twitter was essentially one large bot farm was one of his main sticking points during his Twitter acquisition. Bots, particularly porn bots, have continued to be a problem…

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