Alexei Leonov, first human to walk in space, dies aged 85

The Soviet cosmonaut almost didn’t make it back into his capsule in 1965, when his suit inflated in the space vacuum

Alexei Leonov, the legendary Soviet cosmonaut who became the first human to walk in space 54 years ago, has died in Moscow at 85.

The Russian space agency Roscosmos announced the news on its website on Friday, but gave no cause of death. Leonov had health issues for several years, according to Russia media.

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‘Ultimate gift to future generations’: plan to laser map all land on Earth

Project to record cultural, geological and environmental treasures at risk from climate crisis

A project to produce detailed maps of all the land on Earth through laser scanning has been revealed by researchers who say action is needed now to preserve a record of the world’s cultural, environmental and geological treasures.

Prof Chris Fisher, an archaeologist from Colorado State University, said he founded the Earth Archive as a response to the climate crisis.

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The climate crisis in 2050: what happens if cities act but nations don’t?

It is cities, not national governments, that are most aggressively fighting the climate crisis – and in 30 years they could look radically different

She has barely ever been in a car, and never eaten meat or flown. Now 31, she lives on the 15th floor of a city centre tower from where she can just see the ocean 500 yards away on one side and the suburbs and informal settlements sprawling as far as the eye can see on the other.

Life is OK in this megacity. She earns the exact median income and is as green as she feels she can be: she has no children yet, her carbon footprint is negligible, and her apartment, built in the early 2000s, has been retrofitted for climate change with deep insulation, its own solar air-con and heating systems.

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Our ‘inner salamander’ could help treat arthritis, study finds

Research links human ability to regrow cartilage to molecules that help amphibians sprout new limbs

Contrary to popular opinion, humans can regrow cartilage in their joints, researchers have found. Experts hope the research could lead to new treatments for a common type of arthritis.

Osteoarthritis, in which joints become painful and stiff, is the most common form of arthritis and is thought to cause pain in about 8.5 million people in the UK alone. It is caused by a breakdown in the cartilage that protects the ends of the bones, as well as the growth of new bone around the joint as the body tries to repair the damage.

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Artificial womb: Dutch researchers given €2.9m to develop prototype

Model from Eindhoven University will surround baby with fluid and deliver oxygen and nutrients via umbilical cord

Attempts to create an artificial womb for premature babies have been given a boost by the award of a €2.9m (£2.6m) grant to develop a working prototype for use in clinics.

The model, which is being developed by researchers at the Eindhoven University of Technology, would provide babies with artificial respiration. However, unlike current incubators the artificial womb would be similar to biological conditions, with the baby surrounded by fluids and receiving oxygen and nutrients through an artificial placenta that will connect to their umbilical cord.

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Nobel prize in physics awarded to cosmology and exoplanet researchers

James Peebles, Michel Mayor and Didier Queloz honoured for for ‘improving our understanding of evolution of universe and Earth’s place in the cosmos’

Three scientists have been awarded the 2019 Nobel prize in physics for groundbreaking discoveries about the evolution of the Universe and the Earth’s place within it.

The Canadian scientist James Peebles has been awarded half of the 9m Swedish kronor (£740,000) prize for his theoretical discoveries about the evolution of the universe. A Swiss duo of astronomers, Michel Mayor and Didier Queloz, will share the other half of the prize for their discovery of the first planet beyond our solar system.

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Saturn overtakes Jupiter as host to most moons in solar system

The gas giant has 82 moons, surpassing the 79 known to orbit its larger neighbour

Saturn has taken over from Jupiter as host to the most moons in the solar system after astronomers spotted 20 more lumps of rock orbiting the ringed planet.

It brings the number of Saturnian moons to 82, surpassing the 79 that are known to orbit Jupiter, its larger, inner neighbour.

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It’s not just Greta Thunberg: why are we ignoring the developing world’s inspiring activists? | Chika Unigwe

Young people in the global south have been tackling the climate crisis for years. They should be celebrated too

Ridhima Pandey was just nine years old in 2017 when she filed a lawsuit against the Indian government for failing to take action against climate change. Pandey’s fierce, astounding passion for the environment is not accidental. Her mother is a forestry guard and her father an environmental activist; and the whole family was displaced by the Uttarakhand floods of 2013, which claimed hundreds of lives.

In Kenya Kaluki Paul Mutuku has been actively involved in conservation since college, where he was a member of an environmental awareness club, and has been a member of the African Youth Initiative on Climate Change since 2015. Raised in rural Kenya by a single mother, Mutuku’s vigorous activism, like Pandey’s, was inspired by the direct challenges his family (and wider community) faced from the effects of climate change: “Growing up, I witnessed mothers cover kilometres to fetch water,” he says.

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Paralysed man walks using mind-controlled exoskeleton

French patient’s breakthrough could lead to brain-controlled wheelchairs, say experts

A French man paralysed in a nightclub accident has walked again thanks to a brain-controlled exoskeleton, providing hope to tetraplegics seeking to regain movement.

The patient trained for months, harnessing his brain signals to control a computer-simulated avatar to perform basic movements before using the robot device to walk. Scientists described the trial results as a breakthrough.

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Scientists observe mysterious cosmic web directly for first time

Observations reveal cluster of galaxies about 12bn light years away linked by gas filaments

The cosmic web, a vast, mysterious structure that links up far-flung galaxies, has been observed directly for the first time.

The observations reveal that an ancient cluster of galaxies about 12bn light years away in the constellation of Aquarius are linked together by a network of faint gas filaments. The existence of the cosmic web is central to current theories of how galaxies first formed following the big bang, but until now evidence for it had remained largely circumstantial.

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Ocean cleanup device successfully collects plastic for first time

Floating boom finally retains debris from the Great Pacific Garbage Patch, creator says

A huge floating device designed by Dutch scientists to clean up an island of rubbish in the Pacific Ocean that is three times the size of France has successfully picked up plastic from the high seas for the first time.

Boyan Slat, the creator of the Ocean Cleanup project, tweeted that the 600 metre-long (2,000ft) free-floating boom had captured and retained debris from what is known as the Great Pacific Garbage Patch.

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Ancient scrolls charred by Vesuvius could be read once again

US scientists say it may be possible to decipher words using new x-ray technique

When Mount Vesuvius erupted in AD79 it destroyed the towns of Pompeii and Herculaneum, their inhabitants and their prized possessions – among them a fine library of scrolls that were carbonised by the searing heat of ash and gas.

But scientists say there may still be hope that the fragile documents can once more be read thanks to an innovative approach involving high-energy x-rays and artificial intelligence.

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Babies exposed to air pollution have greater risk of death – study

Infant mortality rate higher in babies exposed to pollutants such as sulphur dioxide

Babies living in areas with high levels of air pollution have a greater risk of death than those surrounded by cleaner air, a study has found.

It is not the first study to investigate the link between air pollution and infant mortality , but thestudydrew particular focus on different pollutants and its analysis at different points in babies’ lives.

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Scientists invent new technology to print invisible messages

Messages can only be seen under UV light and can be erased using a hairdryer

Forget lemon juice and hot irons, there is a new way to write and read invisible messages – and it can be used again and again.

The approach, developed by researchers in China, involves using water to print messages on paper coated with manganese-containing chemicals. The message, invisible to the naked eye, can be read by shining UV light on the paper.

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Most of world’s biggest firms ‘unlikely’ to meet Paris climate targets

Only a fifth of the companies will remain on track, according to analysis of their disclosures

More than four fifths of the world’s largest companies are unlikely to meet the targets set out in the Paris climate agreement by 2050, according to fresh analysis of their climate disclosures.

A study of almost 3,000 publicly listed companies found that just 18% have disclosed plans that are aligned with goals to limit rising temperatures to 1.5C of pre-industrialised levels by the middle of the century.

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UN secretary general hails ‘turning point’ in climate crisis fight

  • United Nations hosts climate summit in New York on Monday
  • New data shows 2014-19 warmest five-year period on record

The world may have hit a hopeful “turning point” in the struggle to tackle the climate crisis despite escalating greenhouse gas emissions and the recalcitrance of major emitters Brazil and the US, according to the United Nations secretary general.

Related: Trump to snub climate summit for religious freedom meeting at UN

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When my husband died, mushroom foraging helped me out of the dark

After losing all sense of hope and home, hunting in woodland with other mushroomers got me through my grief

I was a bright-eyed 18-year-old, just one month into an international study exchange in Stavanger in Norway when I met Eiolf. I stood next to him at a party and we spent the whole night talking. It helped that he was one of the few Norwegian students I met who could actually point to my home country of Malaysia on a map. After that night I’d hang around the library hoping to cross his path. Luckily, he had the same idea.

Eiolf was knowledgeable and read a lot, but he also had a goofy sense of humour. He was very kind, too, the sort of person who children and animals gravitate towards. I had assumed that at the end of my exchange I’d go back to Malaysia, but instead I relocated to Norway to be with him; it just felt right. Norway was very different to my homeland, but I settled there and enjoyed a fulfilling career as an anthropologist, while Eiolf became an architect. We were together for 32 years, and I never lost that sense of joy in our relationship. He made me a better version of myself.

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Voices for the Future: climate activism lights up the UN – in pictures

The United Nations headquarters in New York plays host to an immersive art installation by artist Joseph Michael that features images of an iceberg and six young advocates including Greta Thunberg addressing hopes and fears around the climate crisis and the urgent actions that must be taken

  • Voices For the Future will be performed 7.30-10 pm EDT on Friday 20 September outside the UN building in New York
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Global climate strike: Greta Thunberg and school students lead climate crisis protest – live updates

Millions of people from Sydney to Manila, Dhaka to London and New York will march for urgent action on climate breakdown

Glorious scenes in Edinburgh as thousands of children, parents, students and musicians gather at the Meadows for the Climate Strike.

“This is our Earth and our Future. We need to take care of it ,” said 11-year-old Leila Koita, pictures here with friends Eilidh Tedesco, Norah Turner, Tilly Torrie, Megan Berger and NaN Zhang.

Norah’s mum, Jo Spencely says she hasn’t been on a demo for decades but she is here to show support. “I’m massively concerned about their future. I almost can’t bear to read about the climate. It’s so scary.”

The march sets off at 11:30am and will pass through Edinburgh city centre and end with a rally in front of the Scottish Parliament. As in London, police have imposed restrictions, in this case by refusing permission for the marchers to walk down Princes Street.

As elsewhere, this is just the start of a week of climate action. On Saturday, activists will stage a “die in”, Monday will be a “day of disruption”, musicians will join a “Love the Planet Festival” on Wednesday, and there’ll be another rally outside parliament the following day.

Even Emmeline Pankhurst has joined in the protests in Manchester. A statue of the suffragette hero has donned a bright orange lifejacket and a placard that asks: “Ready for rising sea levels to reach this height?”

The stunt was the idea of Katie Bradshaw and Ryan Griffiths, both 31, who described themselves as first-protestors who felt the need to act today.

“Emmeline still carries that Mancunian spirit of standing up for what she believes in and great causes,” said Griffiths. “Climate change is so important and we think it’s something herself would be an issue she would be at the forefront of if she were around today.”

Bradshaw added: “We’ve got to do our bit and even if it’s just putting some signs up and making people realise we need to look after our planet. If she was around today she’d be supporting it.”

Emmeline Pankhurst showing the world the way in Manchester pic.twitter.com/Z1TFjYCAuN

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Climate scientists prepare for largest ever Arctic expedition

Hundreds of researchers will spend year on ship improving understanding of sea ice

Researchers from more than a dozen countries are preparing to launch the biggest and most complex expedition ever attempted in the central Arctic – a year-long journey through the ice they hope will improve the scientific models that underpin our understanding of climate change.

In the €140m (£123m) Mosaic expedition, 600 scientists from 19 countries including Germany, the US, Britain, France, Russia and China will work together in one of the most inhospitable regions of the planet.

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