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  1. 19687

    Are the dates quoted in this article correct? I didn’t think Homo existed as a genus 840,000 years ago. David AdamsBoothwyn, Pa. Fossil finds indicate that the Homo genus originated roughly 2.4 million years ago .—B. Bower

    By Science News
  2. Earth

    Oil Booms: Whales don’t avoid noise of seismic exploration

    Field tests in the Gulf of Mexico suggest that sperm whales there don't swim away from boats conducting seismic surveys of the seafloor, but the noise generated by such activity may be subtly affecting the whales' feeding behavior. With video.

    By Sid Perkins

  3. Wrong Impression: Bipolar kids misinterpret facial cues as hostile

    Children with bipolar disorder are more likely than other kids to read hostility in bland facial expressions.