Who is the brain? are they a user or is it one of the people that run this website

Explanation:

I think that, the same as the biological conception of Brain, The Brain is a network of people who runs this website and whose function is to check if the answers we give are correct or incorrect, Meanqhile, each person has the option to decide whether if the answer she or he receives, are correct or incorrect.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: