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.

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The Hubbel Tension shows a critical discrepancy in how fast the universe is expanding.

open Global / Unspecified, Global

Measurements of the cosmic microwave background yield a lower expansion rate than direct distance ladder measurements of modern galaxies. Resolving this discrepancy could reveal brand-new physics beyond the Standard Model.

discrepancy hubbel tension shows critical science-space

WS02093 · Logged by Ian Patel on 2026-07-22T08:00:00Z · Horizon: 2029 · Working on: 0

Citation ID: WS02093 Title: The Hubbel Tension shows a critical discrepancy in how fast the universe is expanding. URL: https://www.worldsolve.org/index.php?api=problem&id=2093

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2165 public problems
2165 open challenges
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