News

  1. Health & Medicine

    Is HAART hard on the heart?

    Two studies came to opposite conclusions on whether multiple-drug regimens known as highly active antiretroviral therapy (HAART) for people with AIDS also contribute to heart trouble.

    By Damaris Christensen
  2. Earth

    Underground Soil Economy: Microbes hidden in the dirt react to UV boost

    The community of soil microbes may live hidden in the ground, but it still changes when there's more ultraviolet radiation above.

    By Susan Milius
  3. Anthropology

    DNA Diaspora: Humanity may share tangled genetic roots

    A controversial new genetic analysis concludes that Homo sapiens evolved by expanding out of Africa in multiple waves beginning at least 600,000 years ago and then interbreeding, rather than totally replacing close relatives such as the Neandertals.