Cartesian Skepticism – Neo, Meet Rene – Crash Course Philosophy #5

A Long and Difficult Journey, or The Odyssey – Crash Course Literature 201

A Brief History of the Universe – Crash Course Astronomy #44

Solutions – Crash Course Chemistry #27

The Crusades – Pilgrimage or Holy War – Crash Course World History #15

The Dark Ages…How Dark Were They, Really – Crash Course World History #14

Christianity from Judaism to Constantine – Crash Course World History #11

‎2,000 Years of Chinese History! The Mandate of Heaven and Confucius – World History #7

Buddha and Ashoka – Crash Course World History #6

The Persians & Greeks – Crash Course World History #5