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  1. Health & Medicine

    Questions remain about the benefits of taking testosterone

    For men with low testosterone, the pros and cons of taking hormone replacement therapy are mixed.

    By Meghan Rosen
  2. Astronomy

    Seven Earth-sized planets orbit nearby supercool star

    A planetary system called TRAPPIST-1 has seven Earth-sized planets, three in the habitable zone, researchers report.

    By Ashley Yeager
  3. Science & Society

    Science’s questions rarely have clear, easy answers

    Acting Editor in Chief Elizabeth Quill discusses science's complexities.

    By Elizabeth Quill
  4. Quantum Physics

    Readers amazed by Amasia

    Quantum spookiness, shifting landmasses and more in reader feedback.

    By Science News Staff
  5. Health & Medicine

    Instead of starving a cancer, researchers go after its defenses

    There may be ways to block tumors from adapting and outrunning the body’s defenses.