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Number of years to count from one to seven billion
200
Number of stars you can see at night
1000
Number of times around the Earth with seven billion steps
133
Number of text messages sent in the US every second
65000
The area for one person to stand
3 square feet
The area for one person at a party
6 square feet
The area for seven billion people at a party
1500 square miles
The area for seven billion people in a photo
500 square miles
