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The strange principle of quantum entanglement baffled Albert Einstein. Yet finally putting quantum weirdness to the ultimate test, and embracing the results, turned out to be a revolutionary idea

Net zero wasn’t always the target – the consensus used to be that we could continue releasing greenhouse gases and maintain global temperatures. How did that change?

A pet cow has learned to scratch herself with a broom, showing creative problem-solving skills that make it harder to ignore the fact that these animals have minds, says Marta Halina

A pet cow has learned to scratch herself with a broom, showing creative problem-solving skills that make it harder to ignore the fact that these animals have minds, says Marta Halina

Time and time again, scientists have found that one diet beats all others when it comes to our health. Fortunately, it's delicious – and also good for the planet

Time and time again, scientists have found that one diet beats all others when it comes to our health. Fortunately, it's delicious – and also good for the planet

How discovering that different parts of the brain work together as networks has transformed our understanding of everything from daydreaming and emotions to planning and memory

The “enormous revelation” that drugs can be used to prevent catching HIV has benefitted millions and helped slash transmission rates

The “enormous revelation” that drugs can be used to prevent catching HIV has benefitted millions and helped slash transmission rates

A quarter of a century in, this is our definitive pick of the ideas in science and technology that are already transforming the world

A quarter of a century in, this is our definitive pick of the ideas in science and technology that are already transforming the world

They offered so much promise, but ultimately turned sour. These are the most disappointing ideas since the turn of the millennium

They offered so much promise, but ultimately turned sour. These are the most disappointing ideas since the turn of the millennium

A pet cow named Veronika uses a tool in a surprisingly sophisticated way—possibly because she has been allowed to live her best life

Positive thinking may boost immune response from vaccines, new brain training study shows

A "living glue" used by barnacles to attach to underwater surfaces could also seal gut wounds caused by inflammatory bowel disease

A "living glue" used by barnacles to attach to underwater surfaces could also seal gut wounds caused by inflammatory bowel disease

As tensions over Greenland rise, some Europeans are asking whether it is time to disentangle themselves from US tech dominance – but from smartphones to cloud services, rejecting US tech is easier said than done

As tensions over Greenland rise, some Europeans are asking whether it is time to disentangle themselves from US tech dominance – but from smartphones to cloud services, rejecting US tech is easier said than done

It is theoretically possible for a particularly massive star to collapse in on itself to form a black hole rather than exploding in a supernova, and we might now have seen the process in action