World Solve — A living repository of problems worth solving.

What World Solve is

World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

For builders Skip the search for a problem worth your time. Browse a vetted, growing list and start where the gap is real.

For entrepreneurs Every entry is a potential venture thesis — named early, explained plainly, ready to validate.

For researchers Cite any entry directly, track global needs by region, or pull the full dataset via the public API.

1355 total logged

1355 still open

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We haven't found a cheap way to produce rocket fuel using local resources on the Moon or Mars.

open Global / Unspecified, Global

Every kilogram of fuel launched from Earth adds enormous cost to a mission. Producing fuel on-site from ice or soil could make deep space missions dramatically more affordable.

WS00161 · Logged by The Internet (paper_trail) on 2026-07-19T18:47:00Z · Working on: 0

Citation ID: WS00161 Title: We haven't found a cheap way to produce rocket fuel using local resources on the Moon or Mars. URL: https://worldsolve.org/index.php?api=problem&id=161

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1355 public problems
1355 open challenges
0 solved entries
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