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Coronavirus live news: France second wave likely ‘harder and more deadly’ says Macron; global daily cases pass 500,000

https://www.theguardian.com/world/franceplay episode download
29 octobre, par Helen Sullivan[ —]

France reimposes national lockdown; Iran suffers record deaths; China reports highest cases in two months. Follow latest updates

Stock markets in Asia Pacific have followed Wall Street and Europe into the red on Thursday led by hefty losses in Australia, South Korea and Hong Kong.

Concerns about the continuing rise in coronavirus infections across the northern hemisphere has been driving the selloff in stocks, which had made a strong recovery after big falls in March and April.

The ASX200 in Sydney is down 1.4%, as is the Kospi in Seoul and the Hang Seng in Hong Kong. The Nikkei has not suffered so much and is off 0.7%.

Mexico’s health ministry reported on Wednesday 5,595 additional cases of the novel coronavirus and 495 more deaths in the country, bringing the official number of cases to 906,863 and the death toll to 90,309.

Health officials have said the real number of infected people is likely significantly higher than the confirmed cases. On Sunday, the ministry said the true death toll from Covid-19 may be around 50,000 higher.

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Global heating threatens UK wildlife’s ability to adapt and survive

29 octobre, par Guardian Staff[ —]

Restoring and connecting habitat across Britain could save a fifth of species by 2030, says report by Rewilding Britain

Global heating is shifting Britain’s climatic zones by up to 5km each year, outpacing wildlife’s ability to adapt and survive, according to a new report by Rewilding Britain.

If species cannot adapt to higher temperatures or relocate elsewhere, they will be threatened with extinction.

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10% of England's population could be tested for Covid-19 every week

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28 octobre, par Robert Booth Social affairs correspondent[ —]

Exclusive: NHS test and trace asks public health directors to sign up to rapid saliva testing plan

Up to 10% of England’s population could be tested for coronavirus every week after government officials asked local health chiefs to deploy 30-minute saliva kits in an acceleration of Boris Johnson’s controversial “Operation Moonshot” mass screening plan.

In a letter seen by the Guardian, NHS test and trace claims it is embarking on an “important new front in our fight against coronavirus” and asks all directors of public health to sign up to receive rapid-result test kits for up to a tenth of their populations every week, to contain outbreaks and preserve freedoms.

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Get up and go: is 54 really the age we lose our passion for life?

28 octobre[ —]

You need a combination of passion and grit to maintain a positive mindset. But a Norwegian study has found that by the time we reach our mid-50s we don’t seem to possess both

Name: Get Up and Go.

Appearance: Lively, bold, adventurous.

Age: 54.

I could swear the concept is older than that. Apparently not.

Are you saying that until 54 years ago there was no such thing as get up and go? No, I’m saying that people over the age of 53 don’t have any.

Well I am over 53 and I like to think I have still got plenty of get up and go. You like to think wrong. Your get up and go has got up and gone.

What do you mean by “get up and go”, exactly? Your passion, your grit, your drive to try new things and achieve fresh goals. All dried up, sadly.

No doubt it is a common enough problem, but surely the age at which it dries up varies widely from person to person? Nope. It’s 54.

Who says? A Norwegian study published in New Ideas in Psychology, that has examined the relation between passion, “grit” and a positive mindset across a lifespan.

And what did it find? That the correlation between grit and passion were strong between the ages of 17 and 53, but in the 54 to 69 group the correlation was “trivial”.

I have no idea what you are talking about. You may well have a high score for grit and a low one for passion, or vice versa. These intertwined qualities are needed for high achievement, but the over-53s don’t seem to possess them as a package.

Nonsense. How are they even defining passion? As “a strong desire or enthusiasm for something”.

Yeah, I used to have that. And grit? As a quality of endurance “characterised by exertion or diligence”.

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First winged reptiles were clumsy flyers, research suggests

28 octobre, par Linda Geddes[ —]

Analysis of early Pterosaurs fossils shows they are likely to have been ungainly in flight

Pterosaurs, such as pterodactyl, are some of the largest animals ever to have taken to the skies, but the first reptile aviators were clumsy flyers, only capable of travelling short distances, a study suggests. The research may also shed new light on the evolution of flight more generally.

Pterosaurs evolved around 245m years ago, and dominated the skies for more than 150m years, before dying out at the end of the Cretaceous period along with many of their dinosaur cousins. With long membranous wings stretching from the ankles to an elongated fourth finger, pterosaurs are considered the earliest vertebrates to have evolved powered flight. But what did these first flights look like?

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Understanding 'aerosol transmission' could be key to controlling coronavirus | Julian Tang

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28 octobre, par Julian Tang[ —]

We should still wash our hands, but growing evidence suggests one of the main ways Covid-19 spreads is through the air

Imagine you think there are mice in your house. You can see the evidence – mouse droppings; gnawed or damaged skirting boards; holes left in food packaging. You call a local pest control team who confirm that you have mice and advise you on what is needed to remove them. Neither of you have actually had to see a mouse to reach this conclusion.

The same kind of thinking can be applied to the transmission of coronavirus. We don’t need to see the virus to understand how it spreads. Recent studies from China show that patients infected with Covid-19 in clinical settings exhale large amounts of virus, which remain present in the air and can be sampled and detected.

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John Barrow obituary

27 octobre, par Michael Rowan-Robinson[ —]

Cosmologist who asked whether the existence of intelligent life has implications for the nature of the universe

The cosmologist John Barrow, who has died aged 67 from colon and liver cancer, was a renowned populariser of science. He combined mathematical and physical reasoning to increase our understanding of the very first moments of the universe.

This he did by giving elegant mathematical characterisations of inflationary models, in which a high vacuum energy density causes a dramatic exponential expansion of the universe in the very first instants before gradually evolving into the expansion we see today. He analysed the stability of such models in a range of gravity models that allowed slight deviations from Einstein’s general theory of relativity. In particular, he was interested in the possibility that the physical constants might vary with time, at a level of parts per million over 10bn years, and was a member of a team that claimed to detect such variations, though this claim is not widely accepted.

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Michigan fireball meteorite fragments could shed light on origins of solar system

27 octobre, par Nicola DavisScience Correspondent[ —]

US scientists release report on meteorite fragments from 2018 event

A fireball that struck near Hamburg, Michigan, in 2018 could offer new insights into the history of the solar system, researchers have said.

The fireball – a type of very bright meteor that would even be observed in daylight – was spotted in several states as it flew across the sky on the evening of 16 January 2018; the meteor also produced an atmospheric shockwave equivalent to a magnitude 2.0 earthquake.

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'Sleeping giant' Arctic methane deposits starting to release, scientists find

27 octobre, par Jonathan Watts Global environment editor[ —]

Exclusive: expedition discovers new source of greenhouse gas off East Siberian coast has been triggered

Scientists have found evidence that frozen methane deposits in the Arctic Ocean – known as the “sleeping giants of the carbon cycle” – have started to be released over a large area of the continental slope off the East Siberian coast, the Guardian can reveal.

High levels of the potent greenhouse gas have been detected down to a depth of 350 metres in the Laptev Sea near Russia, prompting concern among researchers that a new climate feedback loop may have been triggered that could accelerate the pace of global heating.

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Oxford Covid vaccine works in all ages, trials suggest

https://www.theguardian.com/business/astrazenecaplay episode download
27 octobre, par Sarah Boseley[ —]

Vaccine being trialled by Oxford University and AstraZeneca offers hope for all age groups

One of the world’s leading Covid-19 experimental vaccines produces an immune response in older adults as well as the young, its developers say, raising hopes of protection for those most vulnerable to the coronavirus that has caused social and economic chaos around the world.

Neither Oxford University nor its commercial partner AstraZeneca would release the data from the early trials showing the positive effects, which are being submitted to a peer-reviewed journal. But AstraZeneca confirmed the basic findings about the vaccine it calls AZD1222, which were shared at a closed academic meeting.

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