Although we can divide the history of the universe into many distinct "eras," sometimes it’s useful just to have a broad perspective on what events occurred in the very early universe and what events occurred later. listed following are events that occurred either before or after the first five minutes in the history of the universe. match these events to the appropriate time period.
it means that there's something else besides speed that contributes to reaction distance. so even when speed is zero, reaction distance is still not zero.