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Browser game

HowLong

A guessing game about how long things take.

Play HowLong
HowLong asking how long a Space Shuttle launch took to reach orbit, with controls for a duration estimate.
A question, six time units, and your estimate.

How long did a Space Shuttle launch typically take to reach orbit?

HowLong is a duration-estimation game. Read a question, set a duration, and submit your best guess.

The answer is entered in time units, from years down to milliseconds. The interface makes very different scales of time part of the same interaction.