Ballpark — June 19, 2026
Answers to that day's 5 daily estimation questions.
Total human population in 1800
~1 billion people
It took all of human history to reach the first billion.
Number of strings on a standard concert harp
47 strings
Most have 7 pedals to adjust the pitch of the strings.
Seconds in a single day
86,400 seconds
24 hours * 60 minutes * 60 seconds.
Teeth a snail has
14,000 teeth
Snails use a radula to scrape food.
People who signed the US Declaration of Independence
56 people
Representing the 13 colonies.