What is God Like – Crash Course Philosophy #12

War & Human Nature – Crash Course World History 204

Trauma & Addiction – Crash Course Psychology #31

The Meaning of Knowledge – Crash Course Philosophy #7

The Heart, part 1 – Under Pressure – Crash Course A&P #25

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

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

Solutions – Crash Course Chemistry #27

Reproductive System, part 4 – Pregnancy & Development – Crash Course A&P #43

OCD & Anxiety Disorders – Crash Course Psychology #29