I thought this was a pretty good article:
After watching the video from the UK beekeeper I got to thinking about some stuff -
1) A new queen will sometimes lay multiple eggs in a cell. Does she lay eggs one right after another or does she walk around and come back to the cell to deposit another egg?
2) Why would a laying worker deposit an egg in a cell that already has 1 or more eggs in it? Wouldn't the worker smell the egg(s)? Is it because the egg(s) doesn't/don't have her pheromones?