World Solve

Some island nations face the real possibility of becoming uninhabitable within decades due to sea level rise. Cheap, effective coastal protection or relocation planning remains urgently unsolved for these communities.

Modern prosthetic limbs can restore some movement, but most still can't let a person genuinely feel what they're touching. Restoring sensory feedback affordably remains a major unsolved bioengineering problem.

Data breaches exposing millions of passwords happen with striking regularity, despite widespread awareness of the problem. A more fundamentally secure approach to authentication is still needed.

Once deployed, a model could be subtly altered or poisoned without obvious signs, potentially changing its behavior in harmful ways. There's no simple, universal way yet to verify a model is exactly as it was originally trained.

Early brain-computer interfaces show promise for people with paralysis, but they remain expensive, invasive, or unreliable outside controlled lab settings. Making them practical for everyday use is still unsolved.

Larger asteroids are easier to spot years ahead, but smaller ones capable of serious regional damage often go undetected until they're very close. Expanding detection capability remains a quiet but serious safety gap.

The leading theory involves a massive collision with early Earth, but several details still don't perfectly match the evidence we've collected from lunar samples. A fuller explanation would clarify Earth's own early history too.

Current spacesuits are bulky, tiring, and limit fine motor movement, making long spacewalks physically exhausting. A more agile suit would make space construction and repair work far more practical.

Some philosophers argue honesty is an absolute duty, while others believe consequences justify occasional deception, particularly to prevent harm. Real situations in medicine and relationships constantly test where this line actually falls.

Vast amounts of carbon and methane are locked in frozen Arctic soil, and as it thaws, it could release gases faster than current climate models predict. Better prediction tools are needed to understand how much this will accelerate warming.

Vast stretches of ocean lie beyond any single nation's jurisdiction, making it difficult to monitor and stop illegal fishing that depletes fish populations faster than they can recover. Closing this enforcement gap remains an unresolved challenge.

Many heavily polluted cities in lower-income regions still lack dense, affordable monitoring networks that could help residents and policymakers respond in real time. Closing this data gap remains a persistent public health and environmental challenge.

Even with improved spill response technology, oil spills can leave lasting ecological damage that persists for years after the initial cleanup appears complete. Preventing spills in the first place remains far more effective than any current cleanup method.

Colony collapse disorder continues to threaten commercial and wild bee populations that are essential for pollinating much of the global food supply. A comprehensive solution addressing all contributing factors at once remains unresolved.

Arctic wetlands store significant amounts of carbon that can be released as methane when they thaw, potentially creating a feedback loop that accelerates warming further. Preventing or slowing this release remains beyond current technological capability.

Invasive plants can spread aggressively in protected parks and reserves, outcompeting native species even where conservation efforts are actively underway. Effective, affordable control methods that don't damage the broader ecosystem remain incomplete.

As temperatures rise, mosquitoes and other disease-carrying insects are expanding into regions that were previously too cold for them to survive, introducing new health and ecological risks. Tracking and responding to this shift remains an unresolved public health and conservation challenge.

Heavy metal contamination can persist in soil for decades, affecting both agricultural productivity and human health in nearby communities. Effective, affordable soil remediation at scale remains an unresolved environmental challenge.

Sophisticated fake prescriptions generated with AI assistance can be difficult for pharmacies to distinguish from legitimate ones without additional verification steps. Closing this gap remains an urgent unresolved challenge for pharmaceutical safety.

Phone batteries degrade noticeably after a couple of years of daily charging cycles, contributing to both consumer frustration and electronic waste from early device replacement. A more durable battery technology remains commercially elusive.