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Science / Fri, 22 May 2026 BBC

A neuroscientist's guide to future-proofing your brain and thinking smarter in the 21st Century

Twenty percent of our day is spent mind-wandering – so not thinking about anything specifically, or trying to work on a particular goal – and that is when you start to get new ideas. Your brain just kind of settles on different things that are rumbling through your mind. And we know that just going out for a walk in nature can help with that process. It helps to increase a very particular frequency of electrical oscillations in the brain called alpha waves, which are associated with calm, creative thinking. It is probably why Archimedes also had his eureka moment in his bath, when he was nice and relaxed in the water.

One is to make the most of our daydreaming. Twenty percent of our day is spent mind-wandering – so not thinking about anything specifically, or trying to work on a particular goal – and that is when you start to get new ideas. Your brain just kind of settles on different things that are rumbling through your mind. And we know that just going out for a walk in nature can help with that process. It helps to increase a very particular frequency of electrical oscillations in the brain called alpha waves, which are associated with calm, creative thinking. It is probably why Archimedes also had his eureka moment in his bath, when he was nice and relaxed in the water.

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