World Solve

AI systems built in one country are used worldwide, but there's no shared international rulebook governing how they should behave. Without cooperation, regulation ends up fragmented and easy to bypass.

Wealthier countries can screen for many rare genetic conditions at birth, but most of the world's newborns are never tested. Expanding this access could catch treatable conditions before irreversible damage occurs.

Once the spinal cord is severely damaged, current medicine offers little hope of restoring movement. Advances in nerve regeneration and brain-computer interfaces are promising but not yet a real cure.

Once the optic or auditory nerves are damaged beyond a certain point, current medicine can't restore lost sight or hearing. Emerging nerve regeneration research is promising but still far from practical treatment.

Sustainable aviation fuel and electric planes exist in early forms but remain far more expensive than traditional jet fuel. Making clean flying both effective and affordable is still an open engineering and economic problem.

Fish farming was supposed to relieve pressure on wild fisheries, but many farms still rely on wild-caught fish for feed. A truly sustainable seafood system would need to break that dependency entirely.

Wealthy nations have historically emitted the most greenhouse gases, but poorer nations often suffer the worst climate damage. Without a fair cost-sharing system, climate justice remains mostly a talking point rather than a policy.

Turning seawater into drinking water is technically possible but still too energy-intensive and expensive for many water-scarce regions. Cheaper desalination could solve water shortages for millions of people.

Direct air capture exists, but it's still far too expensive and energy-intensive to make a dent in global emissions. Making it cheap enough to scale is one of the biggest levers left for slowing climate change.

Machine translation is fast and often accurate, but it still misses jokes, idioms, and cultural context that change meaning entirely. Real cross-cultural communication needs more than word-for-word accuracy.

For decades, computer chips got faster mainly by shrinking transistors, but they're now near the smallest physically possible size. Finding a new way to keep computing power growing is an open engineering problem.

Modern AI models are often accurate but operate like black boxes, even to the people who built them. Without a way to explain their reasoning, it's hard to trust them in medicine, law, or other high-stakes decisions.

Neuroscience can map which brain regions activate during thought, but nobody can explain why that activity produces subjective experience at all. This gap separates our understanding of the brain from any real understanding of the mind.

Space contains vast amounts of metals and water that could support future industry and settlement, but the cost of extraction and transport remains far too high. Making this affordable could unlock a new resource economy beyond Earth.

We know roughly when life began, but not the exact chemical steps that turned non-living matter into something that could reproduce. Solving this would also tell us where else in the universe life might arise.

We can now detect many dangerous asteroids years in advance, but we still lack a proven way to redirect or destroy one heading for Earth. One unlucky strike could cause damage on a civilization-ending scale.

Some volcanoes give warning signs, but many erupt with little notice, putting nearby populations at serious risk. Better prediction could prevent mass casualties near active volcanoes worldwide.

Seismologists can identify risky zones but not the exact moment a quake will strike. A few minutes of reliable warning could save thousands of lives in earthquake-prone cities.

Fusion promises nearly limitless clean energy, but every experiment so far has needed more power to run than it generates. Cracking this would end the global energy crisis outright.

Gravity describes the large scale universe well, and quantum mechanics describes the tiny scale well, but the two don't fit together mathematically. A unified theory would finally explain what happens inside black holes and at the birth of the universe.