4 ms·

Biology is just a layer of abstraction on top of physics. It's turtles all the way down...

• joubert 16y ago
  what do you mean?
  • jleard 16y ago
    Turtles all the way down: http://en.wikipedia.org/wiki/Turtles_all_the_way_down http://en.wikipedia.org/wiki/Turtles_all_the_way_down Fields arranged by purity: http://xkcd.com/435/ http://xkcd.com/435/
    • joubert 16y ago
      Where does evolution by natural selection fit into that xkcd:Purity sketch?