23 articles from SATURDAY 3.7.2021

Brazilians take to streets to demand removal of Jair Bolsonaro

Calls for president’s impeachment intensify amid claims government sort to illegally profit from Covid jabsCoronavirus – latest updatesSee all our coronavirus coverageHuge crowds of protesters have returned to the streets of Brazil’s biggest cities to demand the removal of a president they blame for more than half a million coronavirus deaths.Tens of thousands of demonstrators hit the...

Vaccines ‘outpaced by variants’, WHO warns, as Delta now in 98 countries

Proposals to extend Covid jabs to children in west would delay worldwide rollout, say experts, and allow deadly variants to develop elsewhereCoronavirus – latest updatesSee all our coronavirus coverageRich nations are sharing vaccines with low-income countries too slowly to prevent the spread of the Delta variant of Covid, risking millions of lives, the head of the World Health Organization has...

Cancer: Immunotherapies without side effects?

Immunotherapy has revolutionized the field of cancer treatment. However, inflammatory reactions in healthy tissues frequently trigger side effects that can be serious. Scientists have succeeded in establishing the differences between deleterious immune reactions and those targeting tumor cells that are sought after. It appears that while the immune mechanisms are similar, the cell populations...

Daniel M Davis: ‘Unbelievable things will come from biological advances’

The immunology professor on the personal data which will shape our future and how the pandemic has fired everyone’s interest in the immune systemDaniel M Davis is a professor of immunology at the University of Manchester. He has published over 130 academic papers and two lauded popular science books, The Compatibility Gene and The Beautiful Cure. His third, The Secret Body, describes the...

'Lakes' under Mars' south pole: A muddy picture?

Two research teams, using data from the European Space Agency's Mars Express orbiter, have recently published results suggesting that what were thought to be subsurface lakes on Mars may not really be lakes at all.

Coronavirus live news: doctors call for England to keep some restrictions after 19 July; Indonesia in partial lockdown

BMA chair says easing restrictions not an ‘all or nothing decision’; Indonesia locks down Bali and Java in effort to curb surging infectionsParents angry at shifting government Covid messages, say school leadersThailand reports record Covid-19 cases amid fears over vaccine shortagesDelta variant poses threat to New Zealand’s Covid-free bubbleSee all our coronavirus coverage 9.25am BST An...

‘Real’ T rex goes on show in England for first time in over a century

The skeleton of Titus, discovered in the US in 2018, makes its world debut at Nottingham museumThe first ‘real’ Tyrannosaurus rex to be exhibited in England for more than a century will go on show in Nottingham on Sunday.The skeleton of Titus, discovered in the US state of Montana in 2018, will make its world debut at the Wollaton Hall Natural History Museum as part of a new exhibition on the...

Ministers urged to keep some Covid restrictions after 19 July due to ‘alarming’ rise in cases

Leading doctors are urging the government to keep ‘sensible, cautious’ measures in place to minimise spread of virusLeading doctors are urging the government to keep some measures in place in England after 19 July in a bid to help control the spread of Covid amid the “alarming” rise in cases.The British Medical Association (BMA) said that keeping some protective measures in place was...

The Greatest Adventure by Colin Burgess review – a history of human space exploration

From the first race to the moon to the plutocrats’ search for the next Earth, a story of great risks offers rewardsAt the end of July the second richest man in the world, Amazon’s Jeff Bezos, plans to blast himself into space, a project that has prompted a satirical global petition asking him to stay there. If the history of human space exploration ended at that moment, with the phallic...

Lights, dogs, action! Patagonia project to keep pumas from preying on sheep

A trial using maremma sheepdogs and Foxlights is offering a new way to protect livestock and diffuse conflict with ranchers over the big catsArriving at a fencepost protruding like a needle from the grassland, conservation adviser Nicolás Lagos assembles an LED device that will sit atop the pillar and at nightfall emanate an eerie multicoloured display across the frosted Patagonian valley below....

What’s next for Jeff Bezos? Space, climate and media may all figure

As he hands over top job at Amazon, Bezos will remain largest shareholder and ‘has never had more energy’A quarter of a century after he founded Amazon in a Seattle garage, Jeff Bezos is preparing to loosen his grip on his $1.7tn (£1.2tn) company. Few employees in the sphere conservatories at Amazon’s sprawling Seattle campus headquarters reckon Bezos will relinquish that much of his iron...

Thailand reports record Covid-19 cases as concerns mount about vaccine shortages

Health authorities reported more than 6,200 new Covid-19 cases on Saturday, setting a record for a third straight day Health authorities in Thailand reported more than 6,200 new Covid-19 cases on Saturday, setting a record for a third straight day, as concerns mounted over shortages of treatment facilities and vaccine supplies.Officials also reported 41 deaths, bringing the total to 2,181....

Stress-free path to stress-free metallic films paves the way for next-gen circuitry

Researchers from Tokyo Metropolitan University have used high power impulse magnetron scattering (HiPIMS) to create thin films of tungsten with unprecedentedly low levels of film stress. By optimizing the timing of a 'substrate bias pulse' with microsecond precision, they minimized impurities and defects to form crystalline films with stresses as low as 0.03 GPa, similar to those achieved through...

The City of David and the sharks' teeth mystery

Scientists have found an unexplained cache of fossilised shark teeth in an area where there should be none - in a 2900 year old site in the City of David in Jerusalem. This is at least 80 km from where these fossils would be expected to be found. There is no conclusive proof of why the cache was assembled, but it may be that the 80 million-year-old teeth were part of a collection, dating from just...

Australia Covid news live update: dozens of new Sydney exposure sites as Brisbane in extended lockdown

New South Wales awaits further coronavirus results after most cases in single day since outbreak beganExperts welcome Australia’s four-stage Covid exit strategy but warn ‘hard yards’ still to come‘It makes me sick’: families of Australians stranded overseas devastated after arrivals cap slashedTravel exemptions rise as more Australians apply to fly overseasDownload the free Guardian app;...