April 7, 2001 | Science News

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  • News

    Lasers show atmosphere differs from models

    New observations of the middle and upper atmosphere over Earth's polar regions may require scientists to revamp their mathematical models of temperature and other environmental conditions at high altitudes.
  • News

    Tapeworms tell tales of deeper human past

    A new analysis of tapeworm history suggests that people have been wrong about where we picked up pests: It was not domestication of cattle and pigs but increased meat eating in Africa.
    16 years ago
  • News

    RNA world gets support as prelife scenario

    Scientists tinkering with a chemical now vital to life think they've recreated one of the central molecules that gave rise to the chemistry of life.
    16 years ago
  • News

    Early Brazilians Unveil African Look

    Prehistoric human skulls found in Brazil share some traits with modern Africans, leading a Brazilian scientist to theorize that Africans rather than Asians first arrived in the Americas sometime before 11,000 years ago.
  • Feature

    A Dark Force in the Universe

    Cosmologists are thinking dark thoughts about what kind of mystery force may be contorting the cosmos, pushing galaxies apart at a faster and faster rate.
  • News

    Do eggs go cuckoo under UV light?

    People don't see ultraviolet light but birds do, so studies of egg mimickry may need to stop relying so much on human vision.
    16 years ago