Science
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Keto diet helps with weight loss but also raises cholesterol levels
Keto diets involve getting most of your calories from fat Shutterstock/George Dolgikh Eating a keto diet, which entails consuming most of your calories from fat and very few from carbohydrates, does lead to fat loss, but may also clog arteries and negatively affect the gut microbiome. Also known as a ketogenic diet, this way of eating forces the body to…
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Controversial idea to save corals would replace them with new species
Could drastic action help restore coral reefs? Serge Melesan / Alamy Corals are being hit so hard by global warming that the only way to save reef ecosystems may be to replace native species with more heat-tolerant ones from elsewhere in the world. That is the view of two coral researchers who are calling for the benefits and risks of…
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From Pearl Jam to Dolly Parton, how musicians’ tempos change over time
The band Pearl Jam playing in Barcelona earlier this month Kike Rincon/Europa Press via Getty Images The tempo of songs released by many popular musicians increases until they are in their early 30s and then steadily declines, falling below their teenage level when they reach their 50s. “We saw this very clear downward trend,” says Geoff Luck at the University…
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Planes are under attack from GPS jamming – can we find a fix?
Air traffic controllers can track transatlantic flights’ GPS problems NATS Disruptions to GPS signals, which began near war zones in Europe and the Middle East, are now affecting the busiest oceanic airspace in the world. More than 1700 transatlantic flights cross the North Atlantic between Europe and North America each day. In recent months, a small but growing number of…
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Is ultra-processed food unhealthy? Here’s why no one can agree
Ultra-processed food is often high in fat, sugar and salt GMVozd/Getty Images Nutrition advice is often fickle. In the 1990s, nutritionists blamed fats for rising obesity rates. Then, carbohydrates became the culprit in the early 2000s. Now, the refrain is to eat whole foods and avoid ultra-processed ones. Why can’t we get a straight answer on what we should be…
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Sky Wtr: Canned water made from air and sunlight to hit US stores in September
Cans of Sky Wtr, produced by solar-powered hydropanels, will go on sale later this year in the US Madeleine Cuff Canned water distilled from the air will be available to buy in the US later this year, in an effort to promote solar-powered “hydropanels” that provide an off-grid method of producing drinking water. The panels, created by Arizona-based firm Source,…
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Quantum ‘super behaviour’ could create energy seemingly from nothing
Quantum states can be surprisingly energetic David Wall/Getty In quantum mechanics, the whole can be much greater than the sum of its parts, according to new calculations. They suggest that several low-energy quantum states could be combined into a state containing regions that are dozens of times more energetic than any of the constituent components. The research may ultimately have…
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Time crystals may make quantum computers more reliable
Extremely cold atoms that perpetually move in repeating patterns could be a promising building block for quantum computers Source link
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Elephants seem to invent names for each other
Two juvenile elephants greet each other in Samburu National Reserve in Kenya George Wittemyer Elephants may be the only animals besides humans to come up with arbitrary names for each other, according to an analysis of recordings using machine learning. The analysis found that some calls from African savannah elephants (Loxodonta africana) seem to contain name-like components specific to certain…
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How materials that rewind light can test physics’ most extreme ideas
For an experiment designed to reverse time, the apparatus was surprisingly simple: little more than a tank of water. With a puff of air to disturb the surface, Emmanuel Fort created a set of ripples moving outwards in concentric circles. Then, as the waves spread, he gave the tank a practised jolt – at which point they suddenly started travelling…
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