Column

  1. Math

    Explanations for time’s arrow keep marching on

    By Tom Siegfried
  2. Computing

    When trolls come out from under their bridges, it’s bad news for scientific discourse

    By Rachel Ehrenberg
  3. Planetary Science

    When an asteroid heads for Earth, it’s time to reconsider those doomsday plans

    By Alexandra Witze
  4. Math

    Real-life Maxwell’s demon adds fuel to debate about status of the second law

    Fight Club had its First Rule (don’t talk about Fight Club). The Transporter enforces Rule Number 1 (never change the deal). And NCIS Special Agent Leroy Jethro Gibbs observes Rule 1 (never mix the suspects together in the same room). Physics has the second law of thermodynamics.