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Something very strange is happening to tornadoes across the US. And scientists are baffled

After another explosive start to tornado season, twisters are cropping up in unexpected places – and the big picture isn’t looking any clearer
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Endometriosis still takes years (and surgery) to diagnose. A new test could change that

The condition impacts around 10 per cent of women
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Here's what your cholesterol levels say about your risk of dementia: new study

Your cholesterol levels might affect your future brain health, not just your risk of heart disease
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This 7,000-year-old mummy DNA has revealed a ‘ghost’ branch of humanity

Ancient remains hidden in a Libyan cave have opened the door to a long lost human lineage
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New issue: How to cut your risk of heart disease

The textbook version of a heart can look flat and motionless, which doesn't really equip us with a proper understanding of how it works. It looks different on an ultrasound scan (also known as an echocardiogram). It's easy to be struck by how tireless it is: contracting and relaxing in a precise rhythm without change. It's hypnotic. But of course, the heart does tire – it just takes a few billion beats for it to happen. And for some of us, years of neglect means that it’s likely to happen a little bit sooner. So, how can we add some extra beats or, at the very least, make life a bit easier on the old ticker? Alongside all the usual advice (get some exercise, eat less bacon and so on) researchers are discovering that some surprising small changes can also significantly lower your risk of heart disease. And the good news is that they add up. In this issue, we share what we’ve uncovered.
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These monkeys are the world’s best yodellers, and we have the footage to prove it

Scientists have dubbed their calls 'ultra-yodels'
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Is smoking or vaping worse for you? It depends who’s asking

Research suggests vaping is one of the best ways to help smokers quit the habit. But that doesn’t mean it’s a harmless alternative to smoking
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A 'Bermuda Triangle of Space' has created a no-go region above Earth. Here's how

Above Earth, there is a void, a no-go zone that spacecraft enter at their own peril
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The genius stealth inventions making people, planes and cities invisible

Scientists around the world are working on ways to hide us from sight. But how close are we to developing tech that could make us invisible?
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