YouTube description: Bill reveals the stunning engineering underlying the design of a diaper. He describes the five layers of a diaper, including the superabsorbent polymer in the diaper's core. He... continue reading

posted by Aard Vark (oritteropo) 8 years 9 months ago • 337 views • 6:34

"Pianos can't be perfectly tuned - it's a mathematical fact!" -YT

posted by messenger 9 years 5 months 3 weeks ago • 566 views • 4:20

Fun starts a couple of minutes in

posted by simonm 1 decade 4 months 3 weeks ago • 312 views • 5:05