Why did Nasa smash its spacecraft into an asteroid? | podcast
This week, Nasa scientists smashed a spacecraft into an asteroid, more than 11m km from Earth. Most rocket scientists would wince at the thought, but the Double Asteroid Redirection Test, or DART, was purposefully designed to slam head-on into the asteroid Dimorphos. The aim is to nudge it off its current orbit, in an experiment that will assess the possibility of deflecting a killer space rock – if one was ever headed our way. Ian Sample speaks to Prof Colin Snodgrass about why they chose Dimorphos, what happens to the asteroid now, and whether there are other ways to prevent space-based planetary destructionArchive: BB...
Source: Guardian Unlimited Science - September 29, 2022 Category: Science Authors: Presented by Ian Sample, produced by Jacqui Wakefield and Madeleine Finlay, sound designed by Tony Onuchukwu, and the executive producer was Max Sanderson Tags: Science Nasa Space Asteroids Source Type: news

Ruff day? Dogs can detect if people are stressed, research finds
Study finds stress response changes people ’s ‘odour profile’ – which dogs can sniff outWhether it ’s a tricky maths problem or an unexpected bill, daily life is full of stressful experiences. Now researchers have found that humans produce a different odour when under pressure – and dogs can sniff it out.While previous studies have suggested canines might pick up on human emotions, possibly through smell, questions remained over whether they could detect stress and if this could be done through scent.Continue reading... (Source: Guardian Unlimited Science)
Source: Guardian Unlimited Science - September 28, 2022 Category: Science Authors: Nicola Davis Science correspondent Tags: Science Dogs Animals UK news Pets Source Type: news

Covid might have changed people ’s personalities, study suggests
Younger adults became more prone to stress and less trusting, say US researchersThe impact of the Covid pandemic may have been so deep that it altered people ’s personalities, according to research.Previously psychologists have failed to find a link between collective stressful events, such as earthquakes or hurricanes, and personality change. However, something about the losses experienced or simply the long grind of social isolation appears to have made an impact.Continue reading... (Source: Guardian Unlimited Science)
Source: Guardian Unlimited Science - September 28, 2022 Category: Science Authors: Hannah Devlin Science correspondent Tags: Coronavirus World news Science US news Mental health Source Type: news

Success of experimental Alzheimer ’s drug hailed as ‘historic moment’
Study shows cognition in early-stage patients on lecanemab declines by 27% less than those on placeboAn experimental drug has slowed the rate of decline in memory and thinking in people with early Alzheimer ’s disease in what is being described as a “historic moment” for dementia treatment.The cognition of Alzheimer ’s patients given the drug, developed by Eisai and Biogen, declined by 27% less than those on a placebo treatment after 18 months. This is a modest change in clinical outcome but it is the first time any drug has been clearly shown to alter the disease’s trajectory.Continue reading... (Source: Guardian Unlimited Science)
Source: Guardian Unlimited Science - September 28, 2022 Category: Science Authors: Hannah Devlin Science correspondent Tags: Alzheimer's Dementia Medical research Health Society Science UK news US news World news Older people Mental health Source Type: news

My day on a plate – make sure you put on that pesticide! | First Dog on the Moon
At 6am I have a jar of fresh steam from roasting native figs. That keeps me going until my brunch of organic twigs at 11Sign up here to get an email whenever First Dog cartoons are publishedGet all your needs met at the First Dog shop if what you need is First Dog merchandise and printsContinue reading... (Source: Guardian Unlimited Science)
Source: Guardian Unlimited Science - September 28, 2022 Category: Science Authors: First Dog on the Moon Tags: Farming Agriculture Environment Science Food Source Type: news

My day on a plate – make sure you put that pesticide! | First Dog on the Moon
At 6am I have a jar of fresh steam from roasting native figs. That keeps me going until my brunch of organic twigs at 11Sign up here to get an email whenever First Dog cartoons are publishedGet all your needs met at the First Dog shop if what you need is First Dog merchandise and printsContinue reading... (Source: Guardian Unlimited Science)
Source: Guardian Unlimited Science - September 28, 2022 Category: Science Authors: First Dog on the Moon Tags: Farming Agriculture Environment Science Food Source Type: news

Terrawatch: why is sea level rising faster along China ’s coast?
Study says possible causes could include faster warming in Chinese seas and lower air pressureSea level along the Chinese coast is rising faster than the global average, with some regions experiencing an increase of nearly 5mm a year, according to tide gauge and satellite data. A new study investigates what is causing the localised rise, and identifies which communities are most vulnerable.Global heating is causing sea level rise around the world, with the average rate now 3.6mm a year (compared with 1.4mm a year for most of the 20th century). Oceans are interconnected and water sloshes between them, but the rate of sea le...
Source: Guardian Unlimited Science - September 28, 2022 Category: Science Authors: Kate Ravilious Tags: China Sea level Oceans Science Environment Asia Pacific World news Source Type: news

‘This one’s for the dinosaurs’: how the world reacted to Nasa’s asteroid smashing success
Astrophiles and professionals celebrated humanity ’s accomplishment at hitting a speeding space rock with a probe the size of a vending machineFollow our Australia news live blog for the latest updatesGet ourfree news app,morning email briefing ordaily news podcastThe crashing of a spacecraft is, for once, a cause for celebration. The Dart (Double Asteroid Redirection Test) mission on Tuesday marked humanity ’s first ever attempt at moving an asteroid in space.Scientists at Nasa and Johns Hopkins University applauded and hugged each other on Tuesday after Dart, the size of a vending machine, successfully crashed into D...
Source: Guardian Unlimited Science - September 27, 2022 Category: Science Authors: Donna Lu Tags: Space Science Nasa Asteroids Source Type: news

Multiple chemical sensitivity is real – people who have it aren’t making it up | Letter
For decades, patients with complex illnesses – especially those that affect women more – have been told that it’s in their heads, saysBeth PollackMultiple chemical sensitivity (MCS), discussed in your article, is a common symptom of several illnesses that I research (Allergic to the world: can medicine help people with severe intolerance to chemicals?, 20 September).The article suggests that MCS should be treated, at least in part, as a mental illness. For decades, patients with complex illnesses have been told that it ’s in their heads, and this is especially true for illnesses that predominantly affect females. M...
Source: Guardian Unlimited Science - September 27, 2022 Category: Science Authors: Letters Tags: Health & wellbeing Allergies Long Covid Multiple sclerosis ME / Chronic fatigue syndrome Fibromyalgia Coronavirus Life and style Science Society Source Type: news

400 people in UK diagnosed with preventable cancer every day, data shows
Experts say healthy lifestyle changes such as quitting smoking and eating more vegetables can lower riskMore than 400 people are being diagnosed with preventable cases of cancer every day in the UK, analysis suggests, prompting health experts to urge people to adopt a healthier lifestyle.A total of 387,000 people were diagnosed with cancer in 2019-20, and 40% of those cases – about 155,000 – could have been avoided, according to analysis of the latest official data by the World Cancer Research Fund (WCRF).Continue reading... (Source: Guardian Unlimited Science)
Source: Guardian Unlimited Science - September 27, 2022 Category: Science Authors: Andrew Gregory Health editor Tags: Cancer Health Society Cancer research Breast cancer Science Medical research & wellbeing Nutrition Lung cancer Life and style Source Type: news

How a man and his dogs discovered the cause of narcolepsy – podcast
The Breakthrough prizes are described by their Silicon Valley founders as ‘the Oscars of science’, and while they are not as glamorous, they do come with a $3m award. This year, one of the prizes was dished out to Prof Emmanuel Mignot at Stanford University and Masashi Yanagisawa at the University of Tsukuba for their work uncovering the cause of narcolepsy. Their dis covery has opened the door to the development of treatments for this chronic and often debilitating condition. Madeleine Finlay speaks to Mignot about how he pinpointed the cause of narcolepsy, why it is similar to diabetes and what sleep mysteries he wan...
Source: Guardian Unlimited Science - September 27, 2022 Category: Science Authors: Presented and produced by Madeleine Finlay, sound design by Rudi Zygadlo, and the executive producer was Danielle Stephens Tags: Science Medical research Health Genetics Biology Source Type: news

Feeling depressed or lonely can age us faster than smoking, researchers say
Digital model of ageing reveals importance of psychological health as well as biologicalFeeling unhappy, depressed or lonely could speed up the ageing processes more than smoking or even certain diseases, researchers have suggested.While everyone has an age based on their date of birth – their “chronological age” – they also have what is known as a “biological age”, based on the ageing of the body’s functions, influenced by genetics, lifestyle and other factors. Studies have previously suggested the higher the biological age, the higher the risk of various diseases, and the risk of death.Continue reading... (...
Source: Guardian Unlimited Science - September 27, 2022 Category: Science Authors: Nicola Davis Tags: Health Science Depression Loneliness Source Type: news

‘Basically a bullseye’: Nasa crashes spacecraft into asteroid to test Earth’s defenses – as it happened
Space agency conducts Dart mission to learn whether asteroid ’s trajectory can be diverted away from EarthSix minutes to impact on what is one of Nasa ’s coolest missions of recent history.It has taken Dart 10 months and 470m miles to get here, since launch last year.Usually Nasa spacecraft are intended to operate for many years, or even decades, but not Dart.Dart was built to be destroyed. Dart is a mission of firsts, proving that a spacecraft can autonomously seek, find and approach a target in space that ’s so far away we don’t even know what it looks like.Continue reading... (Source: Guardian Unlimited Science)
Source: Guardian Unlimited Science - September 27, 2022 Category: Science Authors: Richard Luscombe in Miami Tags: Nasa Space Science US news Source Type: news

Nasa successfully crashes spacecraft into asteroid in planetary defense test
Bid to change asteroid ’s course marks ‘new era of humankind’ as agency seeks to protect Earth from future disasterA multimillion-dollar spacecraft collided head-on with an asteroid the size of a football stadium on Monday in an unprecedented test of Nasa ’s capacity to defend Earth from a doomsday scenario.Nasa ’s craft successfully crashed into the asteroid Dimorphos 6.8m miles from Earth. The mission, known as Dart (Double Asteroid Redirection Test), marked humanity’s first attempt at moving another celestial body, with the goal of seeing if a large asteroid hurtling toward our planet could be succes sfully ...
Source: Guardian Unlimited Science - September 27, 2022 Category: Science Authors: Richard Luscombe in Miami Tags: Nasa Space Science US news Source Type: news

Joy and jubilation as Nasa crashes spacecraft into an asteroid in 'planetary defence test' – video
Nasa ’s Dart spacecraft has crashed into the asteroid Dimorphos 6.8m miles from Earth in the space agency’s first “planetary defense test”. Dart (Double Asteroid Redirection Test)  collided head-on with an asteroid the size of a football stadium on Monday in an unprecedented full-scale test of Nasa ’s capacity to defend Earth from a doomsday scenario. The test was humanity’s first attempt at moving another celestial body, to see if a large asteroid hurtling towards Earth could be divertedNasa successfully crashes spacecraft into asteroid in planetary defense testNasa successfully crashes spacecraft into as...
Source: Guardian Unlimited Science - September 27, 2022 Category: Science Tags: Space Nasa Science Source Type: news