How sweet?

How many? ESTIMATION

Drag up or down to guess how many people fit in a real place.

How big? ESTIMATION

Drag the shape to guess the size of a real thing, against a reference that never changes.

Fermi Questions ESTIMATION

Big questions, no calculator: how many heartbeats in a day? Estimate, see how many times off you were, then follow the worked answer. Five a day.

Guess the Weight ESTIMATION

How many grapes weigh as much as a football? Set the count, then watch the balance scale tip. Five estimation rounds a day, with real weights from official sources.

Same Energy TRIVIA

One real food or drink a day. Fill a plate or pour glasses of another until it holds the same energy, then see the real amount, from two official food tables.

Where? GEOGRAPHY

A silhouette, a name, an empty world map: move the map under the crosshair to where the animal lives, then see its real range.

Who? TRIVIA

Guess what the crowd actually answered, from published surveys. Five rounds a day; the reveal shows the crowd's answer beside your guess.

How big? ESTIMATION

Drag the shape to guess the size of a real thing, against a reference that never changes.

How many? ESTIMATION

Drag up or down to guess how many people fit in a real place.

When? HISTORY

Guess when a real event happened by placing it on a timeline.