Describe the change in population between AD 500 and today?
By "today," do you mean January 3rd, 2012 or December 1200?
Also, where are you talking about? Which country, which state, which city? Continent? Do you mean the whole world?
The world population of people is 7,277,477,169 8:00am today population: 7,277,706,325 10:00am today population: 7,277,504,289 12:00pm today population: 7,277,204,430 2:00pm today population: 7,277,328,302 4:00pm: 7,277,302,242 6:00pm: 7,277,403,430 7:00pm: 7,277,482,330 8-9:00pm: 7,277,293,302 12:00am tomorrow population: 7,277,209,360