Mashable        ✔ @mashable 15 Of the Weirdest Educational Videos On @YouTube http://on.mash.to/12ulgwq  2:30 AM – 7 Jul 2013 Duck and Cover 1951 Civil Defense Film with Bert the Turtle (Published on Nov 7, 2009)   Weird indeed, but instructive, useful … Sigue leyendo →