Ballpark — April 8, 2026

About how many cents does a gallon of tap water cost (typical US city)?

~0.5 cent

Tap water is extremely cheap—fractions of a cent per gallon in many places.

Weight of the world's largest animal (Blue Whale)

200 tons

Their tongue alone can weigh as much as an elephant.

Steps in the Eiffel Tower to the top

1,665 steps

Most people take the elevator.

Bitcoins that will ever exist

21 bitcoins (millions)

Hard-coded into the protocol.

Cost to produce a single US penny

3 cents

Due to the rising cost of zinc and copper.