World Solve

Astronauts lose up to 1-2% of bone mass per month in microgravity despite daily intensive physical exercise regimes. Artificial gravity habitats or gene-targeted therapeutics are needed to enable multi-year interstellar trips.

Permanently shadowed craters at the lunar poles reach -240°C, making metals and polymers brittle and prone to shattering. Special cryogenic-resistant alloys and thermal insulation jackets are required.

Severe burn victims often face long, painful recoveries and permanent scarring because lab-grown skin grafts aren't yet fast or effective enough to fully replace damaged tissue. Faster, better regeneration methods could change burn treatment entirely.

Some UN peacekeeping operations have run for so long that local governments and populations start questioning whether they're actually achieving anything anymore. Without clear exit criteria, missions risk becoming permanent without ever solving the underlying conflict.

This means a single permanent member can stop global action on war, genocide, or humanitarian crises regardless of what the rest of the world wants. Reforming this without those same countries blocking the reform remains unresolved.

Mining for the metals used in batteries and electronics often destroys forests, rivers, and habitats that took centuries to form. Balancing resource needs with ecosystem protection remains a persistent unresolved tension.

Much of humanity's cultural knowledge lives only in memory, passed down verbally, and disappears permanently when the last person who remembers it dies. Systematic preservation efforts remain underfunded and incomplete.

Small businesses often struggle to access recovery funding quickly enough after disasters, leading to permanent closures that could have been prevented. Faster, more accessible recovery financing remains an unresolved gap.

Once the tiny hair cells in the inner ear are damaged, human bodies can't naturally regrow them, making most hearing loss permanent. Cell regeneration therapies show early promise but remain far from mainstream treatment.

Heart muscle doesn't regenerate well once damaged, often leaving survivors with permanently reduced heart function. Finding a way to regrow healthy heart tissue could transform recovery for millions of survivors.

Countless websites, articles, and pages vanish permanently when companies shut down or servers go offline. Without better and more complete web archiving, we risk losing large chunks of internet history.

Every lunar mission so far has been short-term, relying entirely on supplies brought from Earth. A base that grows its own food, recycles its own water, and generates its own power would prove long-term space settlement is possible.

Deforestation and rising temperatures are pushing parts of the Amazon toward a state where it can no longer sustain itself as rainforest. Preventing this shift before it becomes irreversible remains an urgent, unresolved challenge.

Tropical forests host a huge share of the world's biodiversity, and converting this land for farming, even when done for legitimate food needs, often results in permanent species loss. Balancing food production with biodiversity protection remains unresolved.

Computer memory still requires a tradeoff between speed, which loses data when powered off, and permanent storage, which is comparatively slower. A technology that fully combines both properties remains a long-sought but unresolved goal in computer engineering.

Most human knowledge lives in systems vulnerable to disaster, conflict, or simple neglect, with no single resilient backup for civilization's collective information. A well-protected global archive could safeguard this against permanent loss.

Historic sites are being lost to conflict, flooding, and neglect faster than preservation efforts can keep up, often permanently. Cheaper, faster preservation methods could save irreplaceable pieces of human history.

Entire island nations and coastal communities face losing their homes permanently, with no agreed international process for where they go or who helps pay for it. This is already happening, not just a future risk.

Growing crops in space or on other planets means dealing with low gravity, radiation, and limited water and soil. Without solving this, any permanent settlement beyond Earth stays dependent on costly resupply missions.

Develop modular, climate-appropriate, culturally suitable transitional housing that avoids prolonged camp conditions and can evolve into permanent homes.