Ballpark — June 23, 2026
Answers to that day's 5 daily estimation questions.
People who attend Burning Man annually
80,000 people
Limited by federal land management permits.
Countries that have hosted the Summer Olympics
23 countries
The US has hosted the most times.
Average human lifespan worldwide
73 years
Lifespans have increased significantly over the last century.
About how many times does a person breathe in a day?
~20,000 breaths/day
Breathing adds up fast—often around twenty thousand breaths per day.
What is the voltage of a standard AA battery?
1.5 V
Most disposable AA batteries are rated at 1.5 volts.