Ballpark — October 27, 2026

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.

Years a tortoise can live

150 years

Adwaita, an Aldabra giant tortoise, lived to 255.

Length of a day on Venus

243 Earth days

Venus rotates very slowly in the opposite direction.