Every number has a source.

Mountain heights

Eight named summits · metres above sea level

Elevation measures height above mean sea level, rather than height from the mountain’s base.

Planet sizes

The eight planets · equatorial diameter

These are equatorial diameters. Rapidly rotating giant planets are wider at the equator than at the poles.

Cosmic clocks

The eight planets · Earth days per orbit

A year is one orbit around the Sun. More distant planets generally have much longer years.

Element numbers

21 familiar chemical elements · proton count

The atomic number is the number of protons in a nucleus. It defines the element.

City skylines

Eight completed skyscrapers · architectural height

Architectural height includes a building’s spire, but excludes added antennas.

Country populations

2023 World Bank snapshot · 57 selected countries

Population totals are midyear estimates, not a live population counter.

Attribution / licence: CC BY 4.0

Country sizes

2023 World Bank snapshot · 57 selected countries

Surface area includes inland waters. It differs from land area.

Attribution / licence: CC BY 4.0

GDP per person

2023 World Bank snapshot · 57 selected countries

GDP per capita divides total economic output by population. Current US dollars are not adjusted for purchasing power.

Attribution / licence: CC BY 4.0

Life expectancy

2023 World Bank snapshot · 57 selected countries

This is a population estimate at birth, not a maximum lifespan or a prediction for one person.

Attribution / licence: CC BY 4.0

City living

2023 World Bank snapshot · 57 selected countries

Urban areas follow each country’s national definition; the percentage is a share of its total population.

Attribution / licence: CC BY 4.0

Forest cover

2023 World Bank snapshot · 56 selected countries

Forest cover is measured as a percentage of land area, rather than total surface area.

Attribution / licence: CC BY 4.0

Connected world

2023 World Bank snapshot · 56 selected countries

The indicator counts people who used the Internet during the previous three months.

Attribution / licence: CC BY 4.0

Tourism money

2019 World Bank snapshot · 48 selected countries

This pre-pandemic snapshot includes spending by international visitors and qualifying international passenger transport.

Attribution / licence: CC BY 4.0

Food energy

USDA SR Legacy · per 100 g edible portion · preparation shown

These are food-composition reference values per 100 g, not serving sizes. Cooking and water content change the comparison.

Attribution / licence: CC0 1.0

Protein pantry

USDA SR Legacy · per 100 g edible portion · preparation shown

These are food-composition reference values per 100 g, not serving sizes. Cooking and water content change the comparison.

Attribution / licence: CC0 1.0

Fibre finders

USDA SR Legacy · per 100 g edible portion · preparation shown

These are food-composition reference values per 100 g, not serving sizes. Cooking and water content change the comparison.

Attribution / licence: CC0 1.0

Pokémon weights

Original 151 · standard forms only

Pokédex weights describe fictional species. Alternate forms and later generations are outside this category.

Attribution / licence: BSD-3-Clause; Pokémon names remain their owners’ trademarks

Paris 2024 medals

2024 Summer Olympics · all medal-winning NOCs

A team-event medal counts once for its National Olympic Committee, not once per athlete.

Attribution / licence: CC BY-SA 4.0

World Cup winners

Men’s FIFA World Cup · 1930–2022 · winning teams only

This historical count stops after Qatar 2022. Later tournaments do not change this dataset.

Attribution / licence: CC BY-SA 4.0

Qatar 2022 goals

2022 men’s World Cup · goals in matches · scoring teams only

Goals in extra time count. Penalty-shootout kicks do not count as match goals.

Attribution / licence: CC BY-SA 4.0

River journeys

30 long river systems · first listed conventional estimate

River lengths vary with the chosen source and channel. This snapshot uses one explicitly stated estimate per connected system.

Attribution / licence: CC BY-SA 4.0

Lakes from above

30 large lakes · listed surface area · Caspian Sea included

The Caspian Sea is included as an inland water body. Connected Great Lakes are counted as the separate entries shown in the source.

Attribution / licence: CC BY-SA 4.0

America’s national parks

United States national parks · source’s 2023 area column

Areas are the listed park boundaries, not annual visitor counts. Other National Park Service designations are outside the category.

Attribution / licence: CC BY-SA 4.0

Animal scales

AnAge build 15 · selected species · high/acceptable records

AnAge is a comparative-biology database. Maximum longevity and typical lifespan are different measurements.

Attribution / licence: CC BY 3.0

Animal lifespans

AnAge build 15 · selected species · high/acceptable records

AnAge is a comparative-biology database. Maximum longevity and typical lifespan are different measurements.

Attribution / licence: CC BY 3.0

Movie night

15 familiar films · stated release year · listed theatrical duration

Running times can differ between cuts. The selected films use the preferred or sole minute-duration claim in this frozen snapshot.

Attribution / licence: CC0 1.0

Books through time

Classic novels · original publication · exact-year scoring

The earliest recorded publication year is used. This category always asks for a numerical year.

Attribution / licence: CC0 1.0

World Bank · World Development Indicators

The World Bank: World Development Indicators. Original providers include the UN, FAO, ITU, UN Tourism, OECD and national statistical agencies. Values are fixed to the years shown and rounded for display. No endorsement is implied.

USDA FoodData Central · SR Legacy

U.S. Department of Agriculture, Agricultural Research Service, Beltsville Human Nutrition Research Center. FoodData Central, SR Legacy (2018). Data extracted and food labels shortened; all amounts refer to 100 g of the stated edible preparation.

Wikidata contributors

Wikidata contributors. Duration and publication dates were extracted from identified entities; preferred duration claims are used. Facts were rewritten for this game.

Wikipedia contributors

Wikipedia contributors, articles linked from each category and answer. Numerical tables were extracted, scoped to the stated events or measurements, and normalized. The adapted table data is available under CC BY-SA 4.0; this does not relicense the independent game code.

AnAge · HAGR

João Pedro de Magalhães and Joana Costa, AnAge / Human Ageing Genomic Resources, build 15 (2023). Selected numerical records were converted from grams to kilograms where appropriate. Source observations and images were not copied.

PokéAPI

Standard forms of the original 151 species. Weights converted from hectograms to kilograms; no sprites or sounds are used.

Copyright (c) © 2013–2023 Paul Hallett and PokéAPI contributors (https://github.com/PokeAPI/pokeapi#contributing). Pokémon and Pokémon character names are trademarks of Nintendo.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

* Neither the name of PokéAPI nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

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