Christiaan Huygens by Caspar Netscher, 1671. This is a review of Exploiting a Natural Network Effect for Scalable, Finegrained Clock Synchronization, from Stanford and Google researchers. It describes Huygens, a protocol for very accurate clock synchronization, plus (an undersold benefit) very accurate measurements of one-way network latency. I read it because the Huygens protocol is used by Nezha, which I reviewed last week. The Huygens and Nezha papers share two authors. Motivation As Barba...