This is an interesting article about later additions to the quest to measure light's speed: https://www.physicsforums.com/insights/speed-light-galilean-...

I find it interesting that such an important test to quantum mechanics is based on such simple math.

Great quote from a recent post here on HN:

Perhaps the best way to explain local realism is that it’s the thing you believe in, if you believe all the physicists babbling about “quantum entanglement” just missed something completely obvious.

https://news.ycombinator.com/item?id=10269297

Conversation going on on Product Hunt: http://www.producthunt.com/posts/monitorbook