PLANET IN AN OLD WORLD MESS
  • professors
  • gravity fields
  • unfinished revolution
  • Sir Isaac's mistakes
  • mystery tide
  • for school kids
  • Aristotle's muddle
  • Copernicus's fixed sun mistake
  • day length clues
  • heat
  • democracy and academia
  • professors
  • gravity fields
  • unfinished revolution
  • Sir Isaac's mistakes
  • mystery tide
  • for school kids
  • Aristotle's muddle
  • Copernicus's fixed sun mistake
  • day length clues
  • heat
  • democracy and academia