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  1. Space

    This is the most comprehensive X-ray map of the sky ever made

    A new X-ray map of the entire sky, using data from the eROSITA telescope’s first full scan, looks deeper into space than any other of its kind.

    By Maria Temming
  2. Health & Medicine

    What you need to know about the airborne transmission of COVID-19

    More than 200 experts have implored the World Health Organization to acknowledge that the coronavirus can spread through the air.

    By Jonathan Lambert
  3. Particle Physics

    This is the first known particle with four of the same kind of quark

    A weird four-quark particle could be a unique testing ground for the strong force that governs how quarks stick together.