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A genetic analysis of nearly 700,000 people has identified 74 regions of the human genome linked to anxiety symptoms, including 39 that had never before been associated with the condition, giving scientists their most detailed picture yet of the biology behind one of the world's most common mental health disorders.

A young mathematician takes an older scientist's life's work and translates it into equations the older man cannot fully follow. Most established figures would bristle.

In the decades following the Korean War (1950-1953), the mountains in South Korea stood mainly bare due to the wartime destruction, widespread fuel collection, slash-and-burn farming, and illegal logging. This had left the country vulnerable to severe soil erosion, flooding, and declining agricultural productivity.

One of Sri Lanka's ambitious efforts to restore the country's degraded hill nearly a century ago is now being reassessed through the lens of modern ecology. Eucalyptus trees were introduced widely from the 1930s to stabilise eroded lands, supply timber and wood to reduce pressure on native forests.

A fossil collected during a British Antarctic expedition in 1985 has finally been identified as the first dinosaur bone ever discovered on the Antarctic continent, ending four decades of uncertainty. The fossil is a tail vertebra belonging to a titanosaur, a group of long-necked, plant-eating dinosaurs that once roamed the Southern Hemisphere.

For the first time, scientists have recovered ancient human DNA left behind on cave walls and rock art, opening a new way to study the people who created prehistoric paintings thousands of years ago.

For a long time, the story seemed straightforward. As atmospheric carbon dioxide levels fell and the planet cooled, large ice sheets began spreading across the polar regions.

Hotels are usually built for travellers, but some are designed for creatures no bigger than your thumb. Scientists and conservationists have spent years creating these miniature refuges for wild bees in the form of small nesting structures fitted with narrow tunnels that mimic the hollow stems and cavities many solitary bee species naturally use to lay their eggs.

Every second, the Congo River releases about 40,000 cubic metres of freshwater into the Atlantic Ocean. That makes it the world's second largest river by discharge.

Lithium is one of the most effective drugs for bipolar disorder. However, its narrow therapeutic window means the difference between an effective dose and a toxic one is small.