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  1. Eau de fruit fly

    A single scent moves female fruit files to swoon and males to flee. The difference, new research shows, is in the brain’s wiring. Male flies on the prowl put out a pheromone called cis-vaccenyl acetate (cVA) that both sexes detect with scent-sensing cells on their antennae. To explain how cVA prompts such different reactions in […]

    By Ewen Callaway
  2. Paleontology

    Twice upon a Time

    New fossil finds suggest that the complex features of mammals originated earlier than previously thought and might even have evolved independently in different mammalian lineages.

    By Amy Maxmen

  3. 19931

    This article shows the formula for sodium hydrosulfide as NaH2S. Would it not be more accurate to present it as NaHS? G.