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.

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We do not know the physical identity of dark matter, which makes up 85% of cosmic mass.

open Global / Unspecified, Global

Indirect gravitational measurements confirm dark matter's existence, but direct detection experiments have failed to identify the constituent particle. Solving this is necessary to complete our fundamental model of physics.

dark matter know physical identity science-space

WS02072 · Logged by Ian Patel on 2026-07-22T08:00:00Z · Horizon: 2040 · Working on: 0

Citation ID: WS02072 Title: We do not know the physical identity of dark matter, which makes up 85% of cosmic mass. URL: https://www.worldsolve.org/index.php?api=problem&id=2072

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2165 public problems
2165 open challenges
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