Subject / Started by
Unipolar, bipolar, disc, square, infinite plane?

Started by Yaakov ben Avraham « 1 2 3 4 »

Columbus & a Round (or Flat) Earth.

Started by Yaakov ben Avraham « 1 2 »

Aether

Started by Socker « 1 2 3 4 »

Ferdinand Magellan

Started by Yaakov ben Avraham