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  1. Astronomy

    Saturn has a fuzzy core, spread over more than half the planet’s diameter

    Analysis of a wave in one of Saturn’s rings has revealed that the planet’s core is diffuse and bloated with lots of hydrogen and helium.

    By Ken Croswell
  2. Science & Society

    How to detect, resist and counter the flood of fake news

    Misinformation about health is drowning out the facts and putting us at risk. Researchers are learning why bad information spreads and how to protect yourself.

    By Alexandra Witze
  3. Life

    Some viruses thwart bacterial defenses with a unique genetic alphabet

    DNA has four building blocks: A, C, T and G. But some bacteriophages swap A for Z, and scientists have figured out how and why they do it.