Ballpark — February 26, 2026
Answers to that day's 5 daily estimation questions.
Number of moons orbiting Jupiter
115 moons
The four largest (Galilean moons) were seen by Galileo in 1610.
Total weight of the Great Pyramid of Giza
~6 million tons
Built from 2.3 million limestone blocks.
Average number of times a human blinks per day
~14,875 blinks
Blinking keeps the eyes lubricated and clean.
People who climb Mount Everest each year
800 people
Congestion is becoming a major safety issue.
Distance light travels in a single nanosecond
12 inches
Light is incredibly fast, but not instantaneous.