1. Kibble balance

    This tabletop device turns the quantum definition of a kilogram into a real mass

    The mini Kibble balance will measure 10 grams to an accuracy of a few ten-thousandths of a percent.

  2. Astronomy

    Questions about solar storms, slingshot spiders and more reader feedback

    Readers had questions about solar storms, a robotic gripper, slingshot spiders and more.

  3. atomic clock

    A new optical atomic clock’s heart is as small as a coffee bean

    Optical atomic clocks are extremely good at keeping time, and they’re on their way to becoming pocket watches.

  4. space flame

    Spherical flames in space could solve the mystery of soot-free fires

    In microgravity, flames are sphere-shaped. Tests of fire on the International Space Station are helping show how gases flow within flames.

  5. Artificial intelligence gaming illustration
    Artificial Intelligence

    AI can learn real-world skills from playing StarCraft and Minecraft

    By playing StarCraft and Minecraft, artificial intelligence is learning how to collaborate and adapt.

  6. number sense
    Artificial Intelligence

    A new AI acquired humanlike ‘number sense’ on its own

    A new artificial intelligence seems to share our intuitive ability to estimate numbers at a glance.

  7. flamingo lagoon

    The search for new geologic sources of lithium could power a clean future

    Futuristic clean-energy visions of electric vehicles are driving the hunt for lithium.

  8. Puerto Rico
    Science & Society

    Facebook data show how many people left Puerto Rico after Hurricane Maria

    Conventional surveys can’t track migration after natural disasters in real time. But Facebook data may provide a crude estimate of those who flee.

  9. neurons
    Artificial Intelligence

    An AI used art to control monkeys’ brain cells

    Art created by an artificial intelligence exacts unprecedented control over nerve cells tied to vision in monkey brains, and could lead to new neuroscience experiments.

  10. ALMA telescope

    How scientists took the first picture of a black hole

    Here’s how scientists connected eight observatories across the world to create one Earth-sized telescope in order to create an image of a black hole.

  11. multiplication

    Mathematicians may have found the fastest way to multiply huge numbers

    A new theoretical method for multiplying enormous figures appears to achieve a speed first predicted decades ago.

  12. person on dialysis
    Health & Medicine

    Blood vessels built from a patient’s cells could help people on dialysis

    Bioengineered blood vessels could provide a safer alternative than donor vessels or synthetic implants.