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  1. Sexual orientation linked to handedness

    A metanalysis reveals right-handedness is more common among heterosexuals than homosexuals, suggesting a neurobiological basis for sexual orientation.

    By Ruth Bennett

  2. 19302

    I beg to differ with the quote, attributed to Ethan Temeles in this article: “This is the first really unambiguous example of ecology playing a role in the morphological differences between the sexes.” The statement exhibits the annoyingly common practice among zoologists to think and generalize as if only animals (and, even worse, only vertebrates) […]

    By Science News
  3. Animals

    Flowers, not flirting, make sexes differ

    Thanks to lucky circumstances, bird researchers find rare evidence that food, not sex appeal, makes some male and female hummingbirds look different.