Date: 29/07/2015 10:46:44
From: Boris
ID: 754354
Subject: Synced pendulums
http://www.sciencealert.com/scientists-finally-figure-out-why-pendulum-clocks-always-sync-up
and the paper
http://www.nature.com/srep/2015/150723/srep11548/full/srep11548.html