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The new AI model from China's DeepSeek performs on a level with leading US models without requiring as much computing power – but despite a huge drop in their stock, it's not game over for US tech companies

Despite widespread studies revealing the prevalence of racism, its impact is often overlooked. But there are ways to tackle hidden biases and systemic discrimination, says Keon West

In Europe as a whole, the increase in deaths from hot weather over the next century will outweigh the decline in deaths from cold weather, but in colder countries such as the UK, temperature-related deaths will decline overall

In a barrage of executive orders, President Donald Trump has set the US on course to derail climate goals, biomedical research and pandemic readiness

Worlds with liquid water could have formed just 200 million years after the big bang from the remains of the earliest supernovae

Just three nasal injections of blood cells called platelets helped people whose smell was affected by covid-19 identify new odours

As California expands its prescribed burning efforts, a study of more than 180 such projects suggests they are an effective way to reduce a blaze's intensity and smoke

While some progress has been made in limiting greenhouse gas emissions, we are still on the path for high levels of global warming

Cryopreserved coral sperm could be used for future breeding programmes to restore damaged reefs

Carbon removal schemes involving enhanced rock weathering should consider whether the rocks they use are lighter or darker than the soil, say researchers

A lithium battery patterned with holes is flexible, stretchable and allows more airflow than cotton, making it perfect for fitness tracking or medical monitoring wearables

Using a computer model of the retina, researchers have been able to trace the cause of the expanding hole illusion

As the finale of the UK series approaches this evening, these are the best tactics to win the game of backstabbing and treachery, according to forensic psychology, game theory and evolutionary biology

Records from UK vehicle safety tests show that the average lifespan of an electric vehicle is 18 years, and the reliability is still improving considerably from year to year

The Stargate Project aims to build huge data centres for AI development – but the details remain murky, and it is still unclear exactly how this might impact the energy future of the US

South American megafauna, from giant sloths to camel-like creatures, survived thousands of years longer than we thought, challenging the idea that they were hunted to extinction by humans

Many think dinosaurs first emerged on land well south of the equator that now forms part of Argentina and Zimbabwe, but they may have actually arisen in tougher conditions near the equator

More than 130 years after a fungus-eating orchid species was discovered, the purpose of its mysterious appendage has been revealed

The shock discovery that metallic nodules could be producing oxygen in the deep sea made headlines last year – now the team behind it is launching a new project to confirm and explain the findings

After three long years of hoping, it seemed impossible that the second season of Severance could live up to the scope and ambition of the first. But, mercifully, it has, says Bethan Ackerley