Uncategorized

  1. Anthropology

    Reservoirs of Evolution: Rainy periods linked to human origins in Africa

    Three phases of heavy rainfall in eastern Africa between 2.7 million and 900,000 years ago created deep lakes and might have played a critical role in the evolution of human ancestors.

    By Bruce Bower
  2. Health & Medicine

    Outwitting TB: Enhanced vaccine protects mice in lab tests

    An enhanced vaccine appears to offer better protection against tuberculosis than the current version does, a study in mice suggests.

    By Nathan Seppa
  3. Materials Science

    Fine Fabric: New, fast way to make sheets of nanotubes

    Scientists have come up with a way to efficiently produce thin, transparent sheets of carbon nanotubes that are several meters long.