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.

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The neutrino mass hierarchy and absolute mass scale are not fully resolved.

open Global / Unspecified, Global

Oscillation experiments show mixing but leave ordering and scale uncertain. Next-generation beta-decay and cosmological probes can answer these questions.

mathematics-logic global-unspecified mass scale neutrino hierarchy absolute not fully resolved oscillation experiments know dark science-space what matter actually

WS01822 · Logged by Ian Patel on 2026-07-22T15:14:00Z · Working on: 0

Citation ID: WS01822 Title: The neutrino mass hierarchy and absolute mass scale are not fully resolved. URL: https://worldsolve.org/index.php?api=problem&id=1822

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2165 public problems
2165 open challenges
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