36 Unusual Units of Measurement - mental_floss on YouTube (Ep.10) 26 Outrageous Truths About Children's Television - mental_floss on YouTube (Ep.50) 21 Mind-Blowing Now-Extinct Lifeforms - mental_floss on YouTube (Ep.51) 40 Weird Word Origins - mental_floss on YouTube (Ep.46) 33 Fascinating Songwriting Stories - mental_floss on YouTube (Ep. 42) 107 Regional Slang Words - mental_floss on YouTube (Ep. 25) 79 Common Mispronunciations - mental_floss on YouTube (Ep. 21) 48 Names for Things You Didn't Know Had Names - mental_floss on YouTube (Ep. 26) 38 Common Spelling and Grammar Errors - mental_floss on YouTube (Ep.9) 32 Superstition Origins - mental_floss on YouTube (Ep. 33) 30 Game Changing Video Games - mental_floss on YouTube (Ep. 37)