How do we solve bitcoin’s carbon problem?

The cryptocurrency consumes more energy than Norway. As countries consider copying China’s ban, experts disagree on whether a greener version is possible

When bitcoin mining company Bit Digital started shipping its energy-intensive computers out of China in early 2021, eyebrows were raised. “A lot of people thought we were being overly paranoid,” says chief strategy officer Sam Tabar, who helped relocate all of the company’s machines to the US and Canada.

But the company’s paranoia paid off. China’s bitcoin mining ban last summer, driven partly by environmental concerns, sent the industry spinning into chaos. The announcement sparked a fire sale of the computers used to power bitcoin, with mining companies scrambling to ship more than 2m of the machines out of China. They arrived by the crateload in countries like the US, Russia and Kazakhstan.

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‘Like sewage and rotting flesh’: Covid’s lasting impact on taste and smell

Many sufferers have been left unable to eat due to long-term distortions to their senses

Four months after getting sick with Covid, Anne-Héloise Dautel couldn’t eat anything at all. “I just wanted to vomit, I was gagging at everything around me,” she said. “I couldn’t even stand my own smell. I was showering five times a day.” Coffee, toothpaste, shampoo and roast meat were the worst. By the time she went to hospital, she weighed just 46kg.

Severe weight loss and kidney failure are some of the impacts of smell and taste distortions which leave people unable to eat or drink things they loved, like coffee or bacon, because they smell like rotting flesh or sewage.

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‘I’m really just high on life and beauty’: the woman who can see 100 million colours

As a kid, Concetta Antico was always ‘a bit out of the box’, but it took decades for her to discover just how differently she was seeing the world

It would be easy to look at the vivid array of colour contained in the paintings of artist Concetta Antico and assume she is using artistic licence. The trunks of her eucalyptus trees are hued with violet and mauve; the yellow crest on her cockatoo has hints of green and blue; the hypercolour of a garden landscape looks almost psychedelic.

“It’s not just an affectation and it’s not artistic licence,” says Antico. “I’m actually painting exactly what I see. If it’s a pink flower and then all of a sudden you see a bit of lilac or blue, I actually saw that.”

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I reclaimed my birth name – and discovered why what we call ourselves really matters

For the first 25 years of my life everyone called me Mandy – and it felt completely wrong

My name is Camilla, so why, for the first 25 years of my life, did everyone call me Mandy? My Jamaican mother loathed the name Camilla. She said my Nigerian father chose the name, but she thought Camilla sounded too damn serious and upper-class. And she was right. Growing up in Luton in the 70s and 80s, there weren’t too many Camillas knocking about the council estates of Bedfordshire. My friends’ names were plain and simple. They were called Debbie, Tracey, Jean. They were easy on the ear. Or their names were culturally appropriate – Jyoti, Shabana, Patience. But Camilla? It might have been the name written on my birth certificate, but my mother had other ideas. She had a plan. And it was hatched in the months after my birth – a new name.

But there were caveats. Unlike Camilla, the new name had to be popular, jolly and understated, with preferably two syllables. So, she drew up a list of potentials: Donna, Paula, Charmaine, Joanne. Then bingo, she came up with the name: Mandy. Not Amanda, but Mandy. Plain. Simple. Easy on the ear, Mandy. Camilla wasn’t changed by deed poll, instead, my unofficial “new name” seeped into everyday life. Mandy seamlessly embedded itself on to the register at primary and secondary school, university and around the water cooler. The name Camilla became a relic of the past, a family joke, dragged out at Christmas like eggnog.

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Long Covid study finds abnormality in lungs that could explain breathlessness

Findings raise possibility Covid may cause microscopic damage not detected by normal tests

Abnormalities have been identified in the lungs of long Covid patients that could offer a potential explanation for why some people experience breathlessness long after their initial infection.

The findings, from a pilot study involving 36 patients, raise the possibility that Covid may cause microscopic damage to the lungs that is not detected using routine tests.

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Is it time to ditch cloth face masks for FFP2 or next-generation alternatives?

As the Covid pandemic has unfolded, the choice of face coverings has mushroomed

During the early days of the pandemic the choice was simple: you either wore a reusable cloth mask or a disposable surgical mask. As the months have progressed, the choice of face coverings and other forms of protection has mushroomed, while the emergence of more transmissible variants has prompted some countries to mandate the wearing of filtering facepiece (FFP) masks in public spaces.

Although face coverings are no longer legally required in England, the government has suggested continuing to wear one in crowded, enclosed spaces where you may come into contact with people you do not normally meet.

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Letter: Richard Leakey obituary

Through my father, Kenneth Oakley, a palaeontologist most famous for helping expose the Piltdown skull hoax, I met all manner of distinguished scientists and other significant figures, but none made as much impression as Richard Leakey, and that was when he was just a kid.

Leakey’s parents, Louis and Mary, had been invited to lunch at our home in Amersham, Buckinghamshire, and a somewhat resistant Richard had been brought along in tow. A couple of years older than me, he ignored me completely, but I could see even then that he had charisma and would go far.

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Cold baths, cherry juice and sleep: the secret to staying fit in your 40s

Despite aching backs and stiff joints, a growing number of elite athletes – from Zlatan Ibrahimović to Serena Williams – are pushing the clock back. So why can’t you? We ask the experts how to do it


Six years ago it looked as if Zlatan Ibrahimovic’s footballing career was approaching the final whistle. After Sweden’s early exit from Euro 2016, the striker announced his retirement from international competition. At 34, he was getting on a bit for an elite athlete. Cut to November 2021 and, days after firing in a spectacular free-kick for his club, AC Milan, Sweden’s record goalscorer was helping keep alive his country’s hopes of making the next World Cup. The retirement chat was over. “I am trying to prove that 40 is just a number,” he said.

Ibrahimovic had joined what feels like a growing club: the quadragenarian athlete holding back the clock. In an era of ever more punishing professional sport, these twilight stars seem to challenge notions that youth trumps all else. Members include American football superstar Tom Brady (44), the tennis legends Venus and Serena Williams (41, 40), Roger Federer (40), and Oksana Chusovitina (46), the eight-time Olympic gymnast from Uzbekistan.

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Orcas recorded killing and feeding on blue whales in brutal attacks

Research is first to document coordinated female-led pods ramming world’s largest animal and eating its tongue before it dies

From snatching sea lions off beaches to stunning fish with a strike of their tails, orcas are renowned for their highly specialised hunting techniques passed down over generations. Now, for the first time, killer whales have been recorded hunting the planet’s largest animal – the blue whale – in coordinated and brutal attacks.

Female-led pods of killer whales, also known as orcas, have been recorded killing and eating blue whales in three separate attacks off the coast of Australia since 2019, according to a paper published in Marine Mammal Science.

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Spotify removes Neil Young music in feud over Joe Rogan’s false Covid claims

Musician condemned spread of misinformation on platform’s top podcast: ‘They can have Rogan or Young’

The music streaming platform Spotify is in the process of removing Neil Young’s music after the company refused to take down Joe Rogan’s podcast amid the musician’s objections that it spread vaccine misinformation.

Rogan has been described by the New York Times as “one of the most consumed media products on the planet”. His podcast, the Joe Rogan Experience, is Spotify’s most popular. In 2020, Rogan signed a $100m deal that gave the streaming giant exclusive rights to his show.

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Coronavirus vaccines may reduce risk of long Covid, ONS study finds

Observational study finds double-jabbed people 41% less likely to report Covid symptoms 12 weeks after a positive test

Vaccination could reduce the risk of long Covid, research by the Office for National Statistics suggests.

The study, of more than 6,000 adults, found those who were double-vaccinated had a 41% lower likelihood of self-reporting Covid symptoms 12 weeks after first testing positive.

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Astronomers discover mysterious pulsing object that may be new class of star

Experts say object is a match for predicted class of neutron star with ultra-powerful magnetic field

Astronomers have discovered a mysterious object emitting a radio wave beam that pulsed every 20 minutes.

The team behind the discovery believe the object could be a new class of slowly rotating neutron star with an ultra-powerful magnetic field. The repeating signals were detected during the first three months of 2018, but then disappeared, suggesting they were linked to a dramatic, one-off event, such as a starquake.

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Long Covid: doctors find ‘antibody signature’ for patients most at risk

Low levels of certain antibodies found to be more common in those who go on to develop long Covid

Doctors have discovered an “antibody signature” that can help identify patients most at risk of developing long Covid, a condition where debilitating symptoms of the disease can persist for many months.

Researchers at University hospital Zurich analysed blood from Covid patients and found that low levels of certain antibodies were more common in those who developed long Covid than in patients who swiftly recovered.

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James Webb space telescope takes up station a million miles from Earth

$10bn observatory manoeuvred into position at four times the orbit of the moon, with first images expected in June

The world’s largest and most powerful telescope has reached its final destination – an observation post one million miles away from Earth.

Nasa’s $10bn James Webb space telescope launched on Christmas Day last year from French Guiana on a quest to behold the dawn of the universe. Due to its sheer size, Webb had to launch folded inside the Ariane 5, a European rocket.

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Hedonism is overrated – to make the best of life there must be pain, says this Yale professor

The most satisfying lives are those which involve challenge, fear and struggle, says psychologist Paul Bloom

The simplest theory of human nature is hedonism– – we pursue pleasure and comfort. Suffering and pain are, by their very nature, to be avoided. The spirit of this view is nicely captured in The Epic of Gilgamesh: “Let your belly be full, enjoy yourself always by day and by night! Make merry each day, dance and play day and night… For such is the destiny of men.” And also by the Canadian rock band Trooper: “We’re here for a good time / Not a long time / So have a good time / The sun can’t shine every day.”

Hedonists wouldn’t deny that life is full of voluntary suffering – we wake up in the middle of the night to feed the baby, take the 8.15 into the city, undergo painful medical procedures. But for the hedonist, these unpleasant acts are seen as the costs that must be paid to obtain greater pleasures in the future. Challenging and difficult work is the ticket to survival and status; boring exercise and unpleasant diets are what you have to go through for abs of steel and a vibrant old age, and so on.

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‘I’ve got this little extra strength’: the rare, intense world of a super smeller

From petrol and perfume to Parkinson’s disease, super-smellers can detect scents others are oblivious to. For Krati Garg, the ability’s both power and pain

A few years ago Dr Krati Garg, an oral surgeon in Melbourne, was in theatre about to commence work on a patient when she told the anaesthetist she could smell sevoflurane.

Sevoflurane is the anaesthetic gas used to put – and keep – patients asleep during surgery. Ingested via a tube that is placed down the throat, in large quantities its bitter smell can be noticeable, but trace amounts are largely indiscernible.

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Darling buds: how best friends keep us healthy and happy

Strong social networks have been shown to improve wellbeing, but what are the extra perks of having a really close friend? And why are women more likely to have one?

“We met when we were five. I don’t know how I would have managed without her.” As children, Barbara Kastelein, from Ashford in Kent, and her best friend, nicknamed “Tulip”, both had alcoholic fathers. Their friendship was an escape from unhappy homes.

The best friends are now both 55 and their relationship is as solid as ever. Barbara says they are more like sisters – and still there for each other during tough times. When Barbara’s father died, Tulip drove for hours to be at the funeral and to help Barbara empty her father’s flat. “I can’t imagine life without her,” says Barbara. “She is my guardian angel.”

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‘It’s a glorified backpack of tubes and turbines’: Dave Eggers on jetpacks and the enigma of solo flight

When inventor ​David Mayman took to the skies, it seemed he’d answered an age-old longing. So why did no one seem to care?

We have jetpacks and we do not care. An Australian named David Mayman has invented a functioning jetpack and has flown it all over the world – once in the shadow of the Statue of Liberty – yet few people know his name. His jetpacks can be bought but no one is clamouring for one. For decades, humans have said they want jetpacks, and for thousands of years we have said we want to fly, but do we really? Look up. The sky is empty.

Airlines are dealing with pilot shortages, and this promises to get far worse. A recent study found that, by 2025, we can expect a worldwide shortfall of 34,000 commercial pilots. With smaller aircraft, the trends are similar. Hang-gliding has all but disappeared. Ultralight aircraft makers are barely staying afloat. (One manufacturer, Air Création, sold only one vehicle in the US last year.) With every successive year, we have more passengers and fewer pilots. Meanwhile, one of the most dreamed of forms of flight – jetpacks – exists, but Mayman can’t get anyone’s attention.

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Covid reinfection: how likely are you to catch virus multiple times?

Omicron may have affected risk in England, but other factors could include vaccination and severity of previous infection

Anecdotal reports of Covid reinfection in the UK are growing, including people testing positive just weeks apart in December and January, or having had the virus three or even four times. Children are also being seen with reinfections. We take a look at the science behind catching Covid multiple times.

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