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The first set of results from a pioneering cosmic-mapping project hints that the repulsive force known as dark energy has changed over 11 billion years, which would alter ideas about how the Universe has evolved and what its future will be.
Decades of evidence shows that exercise leads to healthier, longer lives. Researchers are just starting to work out what it does to cells to reap this reward.
The island nation is expanding its territory by dredging up sediment from the ocean floor. But scientists, former government officials and activists say such reclamation can harm marine ecosystems and make the country more vulnerable to rising seas.
Autonomous weapons guided by artificial intelligence are already in use. Researchers, legal experts and ethicists are struggling with what should be allowed on the battlefield.
Researchers want to unpick how climate change affects mental health around the world — from lives that are disrupted by catastrophic weather to people who are anxious about the future.
Thirty years after the genocide against the Tutsi in Rwanda, Nature met with researchers who are gaining insights that could help to prevent other atrocities and enable healing.
A lack of social interaction is linked to a higher risk of cardiovascular disease, dementia and more. Researchers are unpicking how the brain mediates these effects.
A popular theory about how trees cooperate has enchanted the public and raised the profile of forest conservation. But some ecologists think its scientific basis has been oversold.
Ranga Dias claimed to have discovered the first room-temperature superconductors, but the work was later retracted. An investigation by Nature’s news team reveals new details about what happened — and how institutions missed red flags.