Uncategorized

  1. Health & Medicine

    Drug for preemies linked to problems

    A steroidal drug used to combat lung inflammation in premature infants appears to have long-term negative effects.

    By Nathan Seppa
  2. Astronomy

    Sizing up a black hole

    Astronomers are closing in on the size of the supermassive black hole that lies at our galaxy's center.

    By Ron Cowen
  3. Archaeology

    Israeli cave yields Stone Age kills

    A recently discovered Israeli cave has yielded some of the earliest known evidence of hunting by humans or our evolutionary ancestors, from around 300,000 to 200,000 years ago.

    By Bruce Bower
  4. Anthropology

    Rock-solid choices of first toolmakers

    Human ancestors who took up stone toolmaking in Africa around 2.6