Nifty Tips

Posts Tagged ‘news report’

I remember seeing a news report couple of years ago that earth’s 5 billionth baby was born that day.
How is world population calculated so accurately?
It’s impossible to count each and every person on the planet. Also, in many countries health services are not so devloped to track each birth or maintain records of individuals or voters etc. By statistical methods we can have an approximate number but can never be sure which day 5 billionth person was born.