Recent content by Black Holes

  1. B

    What are some of the most popular science books published before 1840?

    Preferably works that would have influenced scientists of the early 1800s. More specifically those concerning ideas relating to evolution, botany, and other natural sciences. Hypothetical bonus points if you can name some works about linguistics, prehistory, or the Mayans...though obviously...
  2. B

    Is it normal for a girl (10-12 years) to display PMS-type mood swings

    without having begun her period? This is regarding my younger sister who over the past couple years has become very, for lack of a better term, bitchy. She acts like someone with a very bad case of PMS---usually around the time everyone else starts their monthly cycle. I never experienced...
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