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Redan i 30-årsåldern saktar det mentala tempot ner och det är dags att börja sätta in på hjärnkontot. Med en stor kognitiv reserv är det större chans att hjärnan hittar vägar för...
Does time come from the entire universe running computations?
Explaining the passage of time has been a gnarly problem in physics basically forever, but physicist and computer scientist Stephen Wolfram has a radical proposal for where it comes from. He discussed his ideas on time – and what they mean for free will – with reporter Leah Crane
How math helped the Allies win World War II
<p>During World War II, statistics helped the Allies estimate the number of enemy tanks, which proved essential in the decisive move against Nazi Germany</p>
Men’s average testosterone levels have halved in last 50 years, say scientists
<p>Exclusive: Researchers warn of ‘major crisis in male reproductive health’ partly driven by obesity and diabetes</p><p>Men’s average testosterone levels have halved over the past 50 years, according to scientists who say that society is facing a male fertility crisis.</p><p>Total testosterone levels in men declined by 54% between 1972 and 2019, according to data presented at the annual meeting of the European Society of Human Reproduction and Embryology in London on Tuesday.</p> <a href="https://www.theguardian.com/society/2026/jul/07/mens-average-testosterone-levels-have-halved-in-last-50-years-say-scientists">Continue reading...</a>
Catnip lotion as effective as Deet at repelling mosquitoes, study finds
<p>Researchers testing a cheap, homegrown oil in Uganda found what cats knew all along – it worked as well as the artificial chemical used globally </p><p>A homegrown catnip lotion has proven “just as effective as Deet” as a mosquito repellant in trials carried out in Uganda.</p><p>Catnip, or <em>Nepeta cataria</em>, is a common herb from the mint family. The chemical in the plant that causes feline euphoria – nepetalactone – also has insect-repelling properties but this has not previously been commercialised.</p> <a href="https://www.theguardian.com/global-development/2026/jul/07/catnip-lotion-as-effective-as-deet-at-repelling-mosquitoes-study-finds">Continue reading...</a>
Chris Packham: 'I'd throw myself in front of a T. Rex to be consumed'
As Chris Packham gears up for his new TV show, Evolution, he tells Penny Sarchet why understanding the latest evolutionary science is so important if we are to truly appreciate the natural world - and how he would happily die at the hands of a Tyrannosaurus rex