Roger Bacon extols the power of science based on experience and uses a general theory of βspeciesβ to explain light and vision.
π 2015-06-28 07:00 / β 00:19:46
π 2015-06-28 07:00 / β 00:19:47
π 2015-06-21 07:00 / β 00:19:24
π 2015-06-21 07:00 / β 00:19:25
π 2015-06-14 07:52 / β 00:23:28