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Huge and famous Arecibo telescope set to be demolished – CBC.ca

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The National Science Foundation in the U.S. announced Thursday that it will close the huge telescope at the renowned Arecibo Observatory in Puerto Rico in a blow to scientists worldwide who depend on it to search for planets, asteroids and extraterrestrial life.

The independent, federally funded agency said it’s too dangerous to keep operating the single dish radio telescope — one of the world’s largest — given the significant damage it recently sustained. An auxiliary cable broke in August and tore a 30-metre hole in the reflector dish and damaged the dome above it.

Then on Nov. 6, one of the telescope’s main steel cables snapped, causing further damage and leading officials to warn that the entire structure could collapse.

NSF officials noted that even if crews were to repair all the damage, engineers found that the structure would still be unstable in the long term.

“This decision is not an easy one for NSF to make, but the safety of people is our number one priority,” said Sean Jones, the agency’s assistant director for the Mathematical and Physical Sciences Directorate.

“We understand how much Arecibo means to this community and to Puerto Rico.”

He said the goal was to preserve the telescope without placing people at risk, but “we have found no path forward to allow us to do so safely.”

The telescope was built in the 1960s with money from the U.S. Defence Department amid a push to develop anti-ballistic missile defences. In its 57 years of operation, it endured hurricanes, endless humidity and a recent string of strong earthquakes.

Hollywood cameos

The telescope boasts a 305-metre-wide dish featured in the Jodie Foster film Contact and the James Bond movie GoldenEye. Scientists worldwide have used the dish along with the 800-tonne platform hanging 137 metres above it to track asteroids on a path to Earth, conduct research that led to a Nobel Prize and determine if a planet is potentially habitable.

This photo provided by the Arecibo Observatory, shows the damage done by a broken cable that supported a metal platform, creating a 30-metre gash in the radio telescope’s reflector dish in Arecibo, Puerto Rico, Tuesday, Aug. 11, 2020. (Arecibo Observatory/ The Associated Press)

Alex Wolszczan, a Polish-born astronomer and professor at Pennsylvania State University who helped discover the first extrasolar and pulsar planets, told The Associated Press that while the news wasn’t surprising, it was disappointing. He worked at the telescope in the 1980s and early 1990s

“I was hoping against hope that they would come up with some kind of solution to keep it open,” he said. “For a person who has had a lot of his scientific life associated with that telescope, this is a rather interesting and sadly emotional moment.”

Ralph Gaume, director of NSF’s Division of Astronomical Sciences, stressed that the decision has nothing to do with the observatory’s capabilities, which have allowed scientists to study pulsars to detect gravitational waves as well as search for neutral hydrogen, which can reveal how certain cosmic structures are formed.

“The telescope is currently at serious risk of unexpected, uncontrolled collapse,” he said. “Even attempts at stabilization or testing the cables could result in accelerating the catastrophic failure.”

Officials suspect a potential manufacturing error is to blame for the auxiliary cable that snapped but say they are surprised that a main cable broke about three months later given that it was supporting only about 60 per cent of its capacity.

Engineers had assessed the situation after the first cable broke, noting that about 12 of the roughly 160 wires of the second cable that eventually broke had already snapped, said Ashley Zauderer, program officer for Arecibo Observatory at NSF.

“It was identified as an issue that needed to be addressed, but it wasn’t seen as an immediate threat,” she said.

The telescope was built in the 1960s with money from the Defence Department amid a push to develop anti-ballistic missile defences. In its 57 years of operation, it endured hurricanes, endless humidity and a recent string of strong earthquakes. (Brennan Linsley/Associated Press)

Loss for science, tourism

The news saddened many of the more than 250 scientists that have used a telescope that is also considered one of Puerto Rico’s main tourist attractions, drawing some 90,000 visitors a year. It also has long served as a training ground for hundreds of graduate students.

The NSF said it intends to restore operations at the observatory’s remaining assets, including its two LIDAR facilities, one of which is located in the nearby island of Culebra. Those are used for upper atmospheric and ionospheric research, including analyzing cloud cover and precipitation data. Officials also aim to resume operations at the visitor centre.

Wolszczan, the astronomer, said the value of the telescope won’t instantly disappear for him and many other scientists because they are still working on projects based on observations and data taken from the observatory.

“The process of saying goodbye to Arecibo will certainly take some years,” he said. “It won’t be instantaneous.”

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Farrell calls for consideration of city bylaw to stop street harassment in Calgary – Calgary Herald

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Article content continued

Some other Canadian cities have rules to deal with street harassment. In London, Ont., you can be fined for using “abusive or insulting language” in a public space.

Street harassment takes many forms, from unwanted sexual comments to whistling to flashing or groping, and it’s based on someone’s perceived gender or sexual identity. It’s a point of focus for gender equity advocates, as an example of how control tactics make people feel unsafe in public spaces.

Sagesse executive director Andrea Silverstone said Monday that street harassment can’t be dismissed as one-off comments or isolated incidents.

“It’s a structured pattern of behaviour that occurs in society that makes certain people feel unsafe,” she said. “Whether they’re women or 2SLGBTQ individuals or visible minorities feeling unsafe on the street.”

Jake Stika, executive director of Next Gen Men, said street harassment is a symptom of how boys absorb the message that being a man is about power and dominance, and they start defining their interactions that way.

Street harassment, he explains, is overwhelmingly perpetuated by men, but men are also key to stopping it.

“It’s not a women’s issue. Women are impacted by it … but what we need to do as guys is take this up as our issue,” he said. “We’re the problem, but we’re also the solution.”

Stika’s organization works to redefine manhood and masculinity with youth and community programs as part of working “upstream” to stop gender-based violence and improve men’s health and relationships.

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AI Solves 50-Year-Old Biology 'Grand Challenge' Decades Before Experts Predicted – ScienceAlert

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A long-standing and incredibly complex scientific problem concerning the structure and behaviour of proteins has been effectively solved by a new artificial intelligence (AI) system, scientists report.

DeepMind, the UK-based AI company, has wowed us for years with its parade of ever-advancing neural networks that continually trounce humans at complex games such as chess and Go.

All those incremental advancements were about much more than mastering recreational diversions, however.

In the background, DeepMind’s researchers were seeking to coax their AIs towards solving much more fundamentally important scientific puzzles – such as finding new ways to fight disease by predicting infinitesimal but vitally important aspects of human biology.

Now, with the latest version of their AlphaFold AI engine, they seem to have actually achieved this very ambitious goal – or at least gotten us closer than scientists ever have before.

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For about 50 years, researchers have strived to predict how proteins achieve their three-dimensional structure, and it’s not an easy problem to solve.

The astronomical number of potential configurations is so mind-bogglingly huge, in fact, that researchers postulated it would take longer than the age of the Universe to sample all the possible molecular arrangements.

Nonetheless, if we can solve this puzzle – known as the protein-folding problem – it would constitute a giant breakthrough in scientific capabilities, vastly accelerating research endeavours in things like drug discovery and modelling disease, and also leading to new applications far beyond health.

For that reason, despite the scale of the challenge, for decades researchers have been collaborating to make gains in developing solutions to the protein-folding problem.

A rigorous experiment called CASP (Critical Assessment of protein Structure Prediction) began in the 1990s, challenging scientists to devise systems capable of predicting the esoteric enigmas of protein folding.

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Now, in its third decade, the CASP experiment looks to have produced its most promising solution yet – with DeepMind’s AlphaFold delivering predictions of 3D protein structures with unprecedented accuracy.

“We have been stuck on this one problem – how do proteins fold up – for nearly 50 years,” says CASP co-founder John Moult from the University of Maryland.

“To see DeepMind produce a solution for this, having worked personally on this problem for so long and after so many stops and starts wondering if we’d ever get there, is a very special moment.”

In the experiment, DeepMind used a new deep learning architecture for AlphaFold that was able to interpret and compute the ‘spatial graph’ of 3D proteins, predicting the molecular structure underpinning their folded configuration.

The system, which was trained up by analysing a databank of approximately 170,000 protein structures, brought its unique skillset to this year’s CASP challenge, called CASP14, achieving a median score in its predictions of 92.4 GDT (Global Distance Test).

That’s above the ~90 GDT threshold that’s generally considered to be competitive with the same results obtained via experimental methods, and DeepMind says its predictions are only off by about 1.6 angstroms on average (about the width of an atom).

“I nearly fell off my chair when I saw these results,” says genomics researcher Ewan Birney from the European Molecular Biology Laboratory.

“I know how rigorous CASP is – it basically ensures that computational modelling must perform on the challenging task of ab initio protein folding. It was humbling to see that these models could do that so accurately. There will be many aspects to understand but this is a huge advance for science.”

It’s worth noting that the research has not yet been peer-reviewed, nor published in a scientific journal (although DeepMind’s researchers say that’s on the way).

Even so, experts who are familiar with the field are already recognising and applauding the breakthrough, even if the full report and detailed results are yet to be seen.

“This computational work represents a stunning advance on the protein-folding problem, a 50-year old grand challenge in biology,” says structural biologist Venki Ramakrishnan, president of the Royal Society.

“It has occurred decades before many people in the field would have predicted.”

The full findings are not yet published, but you can see the abstract for the research, “High Accuracy Protein Structure Prediction Using Deep Learning”, here, and find more information on CASP14 here.

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A 'Beaver Full Moon' With Lunar Eclipse Happened This Morning—And Folks Took Some Stunning Photos – Good News Network

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If you were up in the early hours of this morning, you may have noticed the full moon turning a shade or so darker and redder.

Thomas Lipke

What you were seeing is called a penumbral lunar eclipse. Caused by the moon dipping behind the Earth’s fuzzy penumbra, or outer shadow, this subtle shading effect peaked at 4:32 am ET November 30, when—according to NASA—83% of the moon was in the shadow of our planet.

NASA has also given a list of the names November’s full moon is known by: The Algonquin tribes have long called this the Cold Moon after the long, frozen nights. Others know it as the Frost Moon, while an Old European Name is Oak Moon: perhaps because of ancient Druid traditions that involve harvesting mistletoe from oak trees for the upcoming winter solstice.

In America, the November full moon is perhaps still best known as the Beaver Moon—with Native Americans associating it with a time when the beavers are scrabbling to finish building their dens from mud and sticks and rocks in preparation for winter.

While this was the last penumbral eclipse of the year, don’t worry if you missed the occurrence due to sleep or clouds.

For those who didn’t get to witness the phenomenon in person, from San Francisco to Michigan to the Sydney Opera House, here are some stunning pictures of this year’s last partial lunar eclipse.

RELATED: With Every Planet Visible This Week and Leonid Meteor Shower Shooting Fireballs, It’s Time to Get Out the Telescope

P.S. The next full moon will be the Cold Christmas Moon on December 29, 2020.

The full moon captured with the San Francisco skyline view at Alameda

A peaceful scene from Mackinac Island in Michigan

Surreal views from Joshua Tree

The Columbia River Gorge became a moonrise kingdom

Cool blue views were taken by this photographer in Northumberland, England

This photographer in Russia caught an image straight from a folk tale

Clouds added interest and atmosphere to these photos taken in Preston, England

A calming moment was captured on Rhode Island

The moon united photographers everywhere last night. Here’s a view from Sydney.

SHARE These Far-Out Views With Friends on Social Media…

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