The speed of light is an issue as well - it takes about 1/60 of a second to cross the US. This means it's impossible to synchronize the entire grid. The synchr

The speed of light is an issue as well - it takes about 1/60 of a second to cross the US. This means it's impossible to synchronize the entire grid. The synchronization depends on the length of the path across the US. I'm not sure actually how they propose to deal with this. Edit, found this: https://news.ycombinator.com/item?id=16536121 https://news.ycombinator.com/item?id=16536121