Hank tells us about the team of deadly ninja assassins that is tasked with protecting our bodies from all the bad guys that want to kill us - also known as our immune system. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashC...
Part 3 of this lecture picks up after an unfilmed introductory mention of Dick Gregory, African-American comedian turned health nut. Here is the missing material: Comedian Dick Gregory came to our college campus to speak against the Vietnam war. The ye...