News

  1. Physics

    Light pulses flout sacrosanct speed limit

    Faster-than-light firsts: Restless laser pulse leaves before it arrives, while merging microwaves send out a superluminal scout.

    By Peter Weiss
  2. Astronomy

    Survey confirms composition of the cosmos

    A team of astronomers announced this week that after measuring the redshifts of 100,000 galaxies, they have new evidence for what makes up most of the mass of the universe.

    By Ruth Bennett
  3. Tech

    Deadly Bubble Bath: Ultrasound fizz kills microbes under pressure

    A modest pressure increase on a liquid agitated by ultrasound dramatically boosts the microbe-killing power of those high-frequency sound waves.

    By Peter Weiss
  4. Astronomy

    Hubble Weighs In: Pinning down an extrasolar planet’s mass

    Using a decades-old technique, astronomers have precisely measured the mass of a planet outside our solar system.