News

  1. Physics

    Old battery gets a high-tech makeover

    Redesigned nickel-iron battery gives modern lithium-ion devices a run for their money.

    By Devin Powell
  2. Humans

    What Silicon Valley can learn from Mother Russia

    Imperial tax records from the last decades of the Empire offer clues to what makes a start-up succeed.

    By Rachel Ehrenberg
  3. Earth

    Ozone hikes cardiovascular risk

    The pollutant triggers inflammation and other changes that can heighten the risk of heart attack and stroke.

    By Janet Raloff
  4. Psychology

    Thirtysomethings flex their number sense

    A mental feel for estimating amounts maxes out later in life and may influence math achievement.

    By Bruce Bower
  5. Health & Medicine

    Testosterone therapy takes off pounds

    A five-year study shows that men getting the hormone consistently lose weight.