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34,042 articles from Guardian Unlimited Science

Tusk master: Wally the walrus departs Isles of Scilly and heads north

Marine experts hope the creature is on his way back to the Norwegian archipelago of SvalbardAfter spending the summer wowing British holidaymakers – and sometimes making a nuisance of himself by accidentally sinking boats – Wally the walrus appears to be trying to head home.The British Divers Marine Life Rescue (BDMLR) said on Tuesday that Wally had departed the Isles of Scilly, where he had...

Coronavirus live news: US reaches 70% first-shot goal while Japan shifts to home care for most Covid patients

White House greets vaccine news as ‘Milestone Monday’ while Japan moves to ensure it has enough hospital beds amid a spike in Covid casesUS reaches Biden’s 70% first-shot goal as threat to unvaccinated people growsHundreds of health workers in isolation as Delta hits Australian state of QueenslandJohnson dumps ‘amber watchlist’ plan as it emerges top adviser has quit 6.29am BST More on...

Hopes UK trial will allay pregnant women’s Covid vaccine concerns

Researchers aim to determine optimal gap between doses as well as explore potential side-effects in more detailCoronavirus – latest updatesSee all our coronavirus coverageThe optimal vaccination schedule to protect pregnant women against Covid-19 is to be explored in a UK clinical trial researchers hope will also allay concerns about getting the jab.Last week, Prof Jacqueline Dunkley-Bent, chief...

Why don’t we see more meteorites after big asteroid belt collisions?

Amount of cosmic debris reaching Earth has stayed surprisingly constant in last 500m years, say scientistsThis month it is worth turning your eyes to the night sky to watch the spectacular Perseid meteor shower. Peak viewing time will be around 12 August, when as many as 150 meteors an hour will whizz overhead. Generated by Earth passing through the debris left behind by Comet Swift-Tuttle, these...

Trial to test if cannabis-based mouth spray can treat brain tumours

First such study in the world aims to find out if Sativex combined with chemotherapy can help treat glioblastomaCancer charities and the NHS are preparing to investigate whether a cannabis-based mouth spray can treat brain tumours and help patients to live longer.Doctors will give patients across the UK with a recurrent brain tumour called a glioblastoma the drug, which is known as Sativex,...

Reforestation hopes threaten global food security, Oxfam warns

Over-reliance on tree-planting to offset carbon emissions could push food prices up 80% by 2050Governments and businesses hoping to plant trees and restore forests in order to reach net-zero emissions must sharply limit such efforts to avoid driving up food prices in the developing world, the charity Oxfam has warned.Planting trees has been mooted as one of the key ways of tackling the climate...

Hundreds of health workers in isolation as Delta hits Australian state of Queensland

Outbreak forces millions into lockdown in the sunshine state as New South Wales races to administer 6m doses amid Covid surgeSee all our coronavirus coverageHundreds of critical health workers in the Australian state of Queensland have gone into isolation as the country battles a growing Delta outbreak, while New South Wales raced to administer 6m vaccine doses before the scheduled end of lockdown...

The billionaire space race – podcast

Last month, billionaire after billionaire hopped into spacecraft to reach the final frontier. Shivani Dave speaks to Robert Massey, the deputy executive director at the Royal Astronomical Society, to understand what, if any, positives might come from what has been called ‘the billionaire space race’, or if the money and resources spent on space exploration should be redistributed to focus on...

Queensland Covid update: more than 400 health staff in isolation as 16 new local cases recorded

State’s Delta cluster rises to 47, with nine of the new cases in school students and exposure sites in three major Brisbane hospitalsFollow our Covid live blog for the latest updatesMost Australians comfortable with vaccination passports for domestic travel and venues, poll revealsSome Australians turned away from getting Covid vaccine because of register errorsQld hotspots; Queensland Covid...

Smoking-related cancer twice as prevalent among poor in England

Overall cancer rates are higher among the wealthy, finds Cancer Research UK – but smoking and its cancers are now concentrated among the poorSmoking causes almost twice as many cancer cases among the poor than the well-off, according to new findings that underline the close link between cigarettes and deprivation.About 11,247 cases of cancer caused by smoking are diagnosed among the poorest 20%...