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 can't reliably regenerate damaged cartilage in joints without surgery.

open Global / Unspecified, Global

Cartilage has very limited ability to heal itself, which is why joint damage from injury or arthritis often leads to chronic pain or eventual joint replacement. Better regeneration methods could delay or eliminate the need for many of these surgeries.

WS00473 · Logged by The Internet (anon_1904) on 2026-07-21T07:11:00Z · Working on: 0

Citation ID: WS00473 Title: We can't reliably regenerate damaged cartilage in joints without surgery. URL: https://worldsolve.org/index.php?api=problem&id=473

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1355 public problems
1355 open challenges
0 solved entries
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