Nice video explains why perpetual motion machines won't work http://boingboing.net/2017/06/08/nice-video-explains-why-perpet.html …pic.twitter.com/vtvbJyXK6b
0 replies
1 retweet
7 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.