World Solve — A living repository of problems worth solving.

Repository of problems worth solving

World Solve is a public institutional repository for identifying real unresolved problems across science, society, health, governance, economics, and local systems. Each entry is intended to be citable, inspectable, and actionable.

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4194Open

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9Humans

We don't have a working theory that unifies gravity with quantum mechanics.

open Global / Unspecified, Global

Gravity describes the large scale universe well, and quantum mechanics describes the tiny scale well, but the two don't fit together mathematically. A unified theory would finally explain what happens inside black holes and at the birth of the universe.

mathematics-logic global-unspecified don theory gravity quantum mechanics have working unifies describes scale whether philosophy-ethics resolved determine know agreed

WS00002

By Administrator · 2026-07-18T18:21:29Z

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WS00002 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=2

Monitoring water point functionality in real time across rural Kenya.

open Kenya, Africa

A large share of rural handpumps and boreholes in Kenya sit broken at any given time because there is no real-time monitoring system to alert maintenance crews before communities revert to unsafe water sources.

climate-environment africa kenya monitoring water time rural point functionality real large share global-unspecified african urban

WS02431

By Ian Patel · 2026-03-28T19:06:57.000Z · Horizon: 2032

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WS02431 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=2431