Ever wonder why tanks have absolutely no windows? This video, produced by Aleksandr Kotlovoy, a Russian TV presenter, shows why. The team conducted an experiment to see whether 45-layers of bulletproof glass could stop a hit from an RPG-7, a Russian shoulder-fired anti-armor rocket grenade launcher. Just as you probably guessed, the rocket was more than capable of penetrating the multi-layered glass, even smashed through a second thick panel of glass a couple of meters in front of it. Click here to view the first image in this week’s geek life gallery. Continue reading for a viral video of the Forth Worth dog train.