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A video last May apparently showed police SUVs surging into a crowd that had surrounded them during a protest in Brooklyn.

n July, plainclothes officers were seen on video as they "aggressively detained a woman at a protest and hauled her away in an unmarked vehicle,"

inflicting significant physical and psychological harm and leading to great distrust in law enforcement."

"this longstanding pattern of brutal and illegal force ends. No one is above the law — not even the individuals charged with enforcing it."

"failed to prevent and address the pattern or practice of excessive force and false arrests by officers against peaceful protesters in violation of the First, Fourth, and Fourteenth Amendments of the United States Constitution"

says the NYPD made a practice out of "kettling" — corralling people by using physical force and obstructions — to arrest protesters rather than allowing crowds to disperse.

She and others emphasized the apparent lack of severe health repercussions from reinfection — and the lack of evidence that reinfection is common.

Nearly 4 percent of people who had a previous infection were reinfected, an almost identical rate to those with no history of infection.

“Basically, it’s saying vaccination actually needs to be better than natural immunity. But vaccination is better than natural immunity.”

The study backs up recent laboratory data from South African researchers analyzing blood plasma from recovered patients. Nearly half of the plasma samples had no detectable ability to block the variant from infecting cells in a laboratory dish

The good news is that vaccine trials from Johnson & Johnson and Novavax show that vaccines can work — even against the B.1.351 variant, and particularly in preventing severe illness.

Novavax did not provide a breakdown of mild, moderate and severe cases, but severe cases of covid-19 were rare in the trial, suggesting that reinfection is unlikely to send people to the hospital.

“It is not surprising to see reinfection in individuals who are convalescent. And it would not be surprising to see infection in people who are vaccinated, especially a few months out from vaccine,”

“The key is not whether people get reinfected, it’s whether they get sick enough to be hospitalized.

“If the data holds true, it means we will need to walk the public back on the idea of how close we are to the finish line for ending this pandemic.”

Projections created by data scientist Youyang Gu — whose pandemic models have been cited by the Centers for Disease Control and Prevention — suggest that about 65 percent of America’s population will reach immunity by June 1. But built into that 65 percent is roughly 20 percent having immunity from past infections only.

In a separate study, scientists at Rockefeller University in New York took blood plasma from people who had been vaccinated and found that vaccine-generated antibodies were largely able to block mutations found on the B.1.351 variant.

I think the fact that we … now have data from two vaccines indicating that we can prevent serious disease, even against the new variant, is hopeful,”

A future concern needing close monitoring is whether the reformulation of vaccines to keep up with the evolving virus could drive the virus to continue evolving.

There is also a concern that subpar immunity could allow new resistant variants to emerge. That possibility, Nussenzweig said, is one reason that people should get both doses of a vaccine, on time.

We’ve seen Russian actors intentionally use content posted by innocent Americans. We see other people post and share content from Russian campaigns. It doesn’t mean they’re actually connected. In fact, most times they’re not.

Influence operations are essentially weaponized uncertainty.

One of the most effective countermeasures in all of this is an informed public.

And there are so many opportunities to leverage that complexity to run a perception hack. A perception hack is an attempt to create a perception that there is a large scale influence operation when in fact there is no evidence to support it.

It’s our job to keep this debate as authentic as possible by putting more information and context out there. We can force pages that are pushing information to disclose who is behind them

We are living through a historic election with so many complex pieces to monitor. The piece that I and my team can help with is that we can make sure we secure this debate.

My counterpart at Twitter says I call him more than his mother does. We’re spending lots of time and exchanging information to try and stay ahead of this.

Between 2016 and next week we’ll have worked to protect more than 200 elections across the world. It’s critical to focus on next week, but we also have to remember Myanmar has an election five days later.

The left cerebral hemisphere is to the “right-brained” poet or novelist as the hamstrings and quadriceps are to a competitive sprinter

Because the ability to understand and produce language is focused in the left side of the brain in almost everyone, caricaturing these creative types as using their right brain more than their left brain is silly.

visual-spatial abilities—localized to the right cerebral hemisphere—are skills that are absolutely critical for “left-brained” talents like science or engineering.

But much of our obsession with the brain’s left and right cerebral hemispheres may have started with studies of split brain patients in the ‘50s. During this time, people who suffered multiple seizures a day underwent intense surgery to treat their epilepsy.

To calm the electrical storms that ravaged these patients’ brains, the nerve fibers connecting the left and right hemispheres of the brain were cut. These fibers are collectively known as the corpus callosum

Once the corpus callosum is severed on the operating table, the new split brain patient appears astonishingly normal at first glance

But careful experiments reveal that this person is really two persons, two streams of consciousness in one body

only the left hemisphere can speak

The right hemisphere cannot speak, but it can point to words like “yes” or “no” to answer a question

Each hemisphere, it seems, maintains independent beliefs and personalities, challenging the notion that we are each an indivisible “self.”

We are all “brain-ambidextrous.”

Experts have managed to turn people off all sorts of foods by convincing them it had made them ill when they were a child

“People have a life story, particularly as they get older and for some people it needs to stretch back to the very early stage of life,”

The prevailing account of how we come to believe and remember things is based around the concept of source monitoring. “Every time a thought comes to mind we have to make a decision – have we experienced it [an event], imagined it or have we talked about it with other people,” says Kimberley Wade

Most of the time we make that decision correctly and can identify where these mental experiences come from, but sometimes we get it wrong.

Wade admits she has spent a lot of time recalling an event that was actually something her brother experienced rather than herself, but despite this, it is rich in detail and provokes emotion

Memory researchers have shown it is possible to induce fictional autobiographical memories in volunteers, including accounts of getting lost in a shopping mall and even having tea with a member of the Royal Family

Based on my research, everybody is capable of forming complex false memories, given the right circumstances – Julia Shaw

In some situations, such as after looking at pictures or a video, children are more susceptible to forming false memories than adults. People with certain personality types are also thought to be more prone.

But carrying around false memories from your childhood could be having a far greater impact on you than you may realise too. The events, emotions and experiences we remember from our early years can help to shape who we are as adults, determining our likes, dislikes, fears and even our behaviour.

Memories before the age of three are more than likely to be false. Any that appear very fluid and detailed, as if you were playing back a home video and experiencing a chronological account of a memory, could well also be made up. It is more likely that fuzzy fragments, or snapshots of moments are real, as long as they are not from too early in your life.

We crave a cohesive narrative of our own existence and will even invent stories to give us a more complete picture

Interestingly, scientists have also found positive suggestions, such as “you loved asparagus the first time you ate it” tend to be more effective than negative suggestions like “you got sick drinking vodka”

“Miscarriage of justice, incarceration, loss of reputation, job and status, and family breakdown occur,

One of the major problems with legal cases involving false memories, is that it is currently impossible to distinguish between true and fictional recollections

Efforts have been made to analyse minor false memories in a brain scanner (fMRI) and detect different neurological patterns, but there is nothing as yet to indicate that this technology can be used to detect whether recollections have become distorted.

the most extreme case of memory implantation involves a controversial technique called “regression therapy”, where patients confront childhood traumas, supposedly buried in their subconscious

“Memories are malleable and tend to change slightly each time we revisit them, in the same way that spoken stories do,”

“Therefore at each recollection, new elements can easily be integrated while existing elements can be altered or lost.”

This is not to say that all evidence that relies on memory should be discarded or regarded as unreliable – they often provide the most compelling testimony in criminal cases. But it has led to rules and guidelines about how witnesses and victims should be questioned to ensure their recollections of an event or perpetrator are not contaminated by investigators or prosecutors.

Any memories that appear very fluid and detailed, as if you were playing back a home video, could well also be made up

While this may seem like a bit of fun, many scientists believe the “false memory diet” could be used to tackle obesity and encourage people to reach for healthier options like asparagus, or even help cut people’s alcohol consumption.

Children are more susceptible to forming false memories than adults, especially after looking at photographs or films

And we may not want to rid ourselves of these memories. Our memories, whether fictional or not, can help to bring us closer together.

On Tuesday, the Russian leader paid a visit to the main Moscow hospital for monitoring suspected coronavirus patients, donning protective gear to visit the hospital in the city's suburb of Kommunarka. It was the kind of costume play we're used to seeing from the Kremlin, and reminiscent of one of his earliest moves as Russia's acting president: flying to the war-torn republic of Chechnya in 2000 in the co-pilot's seat of an Su-27 fighter jet.

The results confirm what others have suggested, with the added bonus of being one of the few studies to use a real experimental design, which has the power to show causation. Additionally, it seems to suggest that we don’t need to cut out social media use completely, but just to curtail it.

A really neat study a few years ago illustrated this, finding that the link between social media and depression was largely mediated by this "social comparison" factor.

Social media, especially spending long periods of time on it, is just not that good for us. We may not need to quit it completely, but limiting our time on social media considerably, and reconnecting with friends and family in real life, is definitely the way to go.

Australia is one of the great biodiversity hotspots in the world. The island continent was isolated from the rest of the world for millions of years, allowing evolution to take strange new paths, and until fairly recently, with little human influence.Around 244 species of mammals are found only in Australia. Before the fires, its great diversity of life was already threatened due to invasive species, habitat destruction, and climate change, according to Australia’s science research agency, CSIRO. Now, ecologists are fearing severe ecological consequences from so much land being burnt at once.

“This is a hidden impact of climate change … that could actually impact our ability to solve the problem itself,” he said.

The science is, at first glance, surprisingly fundamental. Researchers have long believed that carbon dioxide harms the brain at very high concentrations. Anyone who’s seen the film Apollo 13 (or knows the real-life story behind it) may remember a moment when the mission’s three astronauts watch a gauge monitoring their cabin start to report dangerous levels of a gas. That gauge was measuring carbon dioxide. As one of the film’s NASA engineers remarks, if CO₂ levels rise too high, “you get impaired judgement, blackouts, the beginning of brain asphyxia.”

The same general principle, he argues, could soon affect people here on Earth. Two centuries of rampant fossil-fuel use have already spiked the amount of CO₂ in the atmosphere from about 280 parts per million before the Industrial Revolution to about 410 parts per million today. For Earth as a whole, that pollution traps heat in the atmosphere and causes climate change. But more locally, it also sets a baseline for indoor levels of carbon dioxide: You cannot ventilate a room’s carbon-dioxide levels below the global average.

In fact, many rooms have a much higher CO₂ level than the atmosphere, since ventilation systems don’t work perfectly.

On top of that, some rooms—in places such as offices, hospitals, and schools—are filled with many breathing people, that is, many people who are themselves exhaling carbon dioxide.

As the amount of atmospheric CO₂ keeps rising, indoor CO₂ will climb as well.

in one 2016 study Danish scientists cranked up indoor carbon-dioxide levels to 3,000 parts per million—more than seven times outdoor levels today—and found that their 25 subjects suffered no cognitive impairment or health issues. Only when scientists infused that same air with other trace chemicals and organic compounds emitted by the human body did the subjects begin to struggle, reporting “headache, fatigue, sleepiness, and difficulty in thinking clearly.” The subjects also took longer to solve basic math problems. The same lab, in another study, found that indoor concentrations of pure CO₂ could get to 5,000 parts per million and still cause little difficulty, at least for college students.

But other research is not as optimistic. When scientists at NASA’s Johnson Space Center tested the effects of CO₂ on about two dozen “astronaut-like subjects,” they found that their advanced decision-making skills declined with CO₂ at 1,200 parts per million. But cognitive skills did not seem to worsen as CO₂ climbed past that mark, and the intensity of the effect seemed to vary from person to person.

There’s evidence that carbon-dioxide levels may impair only the most complex and challenging human cognitive tasks. And we still don’t know why.

No one has looked at the effects of indoor CO₂ on children, the elderly, or people with health problems. Likewise, studies have so far exposed people to very high carbon levels for only a few hours, leaving open the question of what days-long exposure could do.

Modern humans, as a species, are only about 300,000 years old, and the ambient CO₂ that we encountered for most of our evolutionary life—from the first breath of infants to the last rattle of a dying elder—was much lower than the ambient CO₂ today. I asked Gall: Has anyone looked to see if human cognition improves under lower carbon-dioxide levels? If you tested someone in a room that had only 250 parts per million of carbon dioxide—a level much closer to that of Earth’s atmosphere three centuries or three millennia ago—would their performance on tests improve? In other words, is it possible that human cognitive ability has already declined?

Other animals that experienced mass die-offs include sea lions, tufted puffins, and baleen whales. But none of them compared to the murres in scale.

The murres likely starved to death because the Blob caused more competition for fewer small prey. The warming increased the metabolism of predatory fish like salmon, cod, and halibut -- meaning they were eating more than usual. These fish eat the same small fish as the murres, and there simply wasn't enough to go around.

During the 2015 breeding season, three colonies didn't produce a single chick. That number went up to 12 colonies in the 2016 season -- and in reality it could be even higher, since researchers only monitor a quarter of all colonies.

It's especially rare to see a patch of warm ocean water over such a large area, but scientists say global climate change is making these phenomena more common. From 1982 to 2016, there was an 82% rise in the number of heat wave days on the global ocean surface, according to a 2018 study. That's because heat waves are increasing in both frequency and duration, with the highest level of maritime heat wave activity occurring in the North Atlantic

“The Party has increasingly treated ‘stability maintenance’ — a euphemism for social control — as an overarching priority, and devoted enormous resources to security agencies for monitoring dissidents, breaking up protests, censoring the internet, and developing and implementing mass surveillance systems,” she wrote in a recent paper.

“Once these systems are in place, those involved in its developments — particularly companies with money to be made — argue for their expansion or their wider use, a phenomenon known as ‘mission creep.’ What initially started as a system to crack down on crime — which is already a dubious and vague enough justification to encompass political crimes in China — is now used for other purposes including for fighting the coronavirus outbreak.”

“Subjecting 5-year-olds to this technology will not make anyone safer, and we can’t allow invasive surveillance to become the norm in our public spaces,” said Stefanie Coyle, deputy director of the Education Policy Center for the New York Civil Liberties Union.

When the system is on, Mr. LiPuma said, the software looks at the faces captured by the hundreds of cameras and calculates whether those faces match a “persons of interest” list made by school administrators.

Jayde McDonald, a political science major at Buffalo State College, grew up as one of the few black students in Lockport public schools. She said she thought it was too risky for the school to install a facial recognition system that could automatically call the police.

“I’m not sure where they are in the school or even think I’ve seen them,” said Brooke Cox, 14, a freshman at Lockport High School. “I don’t fully know why we have the cameras. I haven’t been told what their purpose is.”

“If suspended students are put on the watch list, they are going to be scrutinized more heavily,” he said, which could lead to a higher likelihood that they could enter into the criminal justice system.

Days after the district announced that the technology had been turned on, some students said they had been told very little about how it worked.

“We all want to keep our children safe in school,” she said. “But there are more effective, proven ways to do so that are less costly.”

SEIR models start to fall apart when you think about the underlying causes of the data. You need models that can allow for all possible states, and assess which ones matter for shaping the pandemic’s trajectory over time.

These techniques have enjoyed enormous success ever since they moved out of physics. They’ve been running your iPhone and nuclear power stations for a long time. In my field, neurobiology, we call the approach dynamic causal modelling (DCM). We can’t see brain states directly, but we can infer them given brain imaging data

Epidemiologists currently tackle the inference problem by number-crunching on a huge scale, making use of high-performance computers. Imagine you want to simulate an outbreak in Scotland. Using conventional approaches, this would take you a day or longer with today’s computing resources. And that’s just to simulate one model or hypothesis – one set of parameters and one set of starting conditions.

Using DCM, you can do the same thing in a minute. That allows you to score different hypotheses quickly and easily, and so to home in sooner on the best one.

This is like dark matter in the universe: we can’t see it, but we know it must be there to account for what we can see. Knowing it exists is useful for our preparations for any second wave, because it suggests that targeted testing of those at high risk of exposure to Covid-19 might be a better approach than non-selective testing of the whole population.

Our response as individuals – and as a society – becomes part of the epidemiological process, part of one big self-organising, self-monitoring system. That means it is possible to predict not only numbers of cases and deaths in the future, but also societal and institutional responses – and to attach precise dates to those predictions.

How well have your predictions been borne out in this first wave of infections?For London, we predicted that hospital admissions would peak on 5 April, deaths would peak five days later, and critical care unit occupancy would not exceed capacity – meaning the Nightingale hospitals would not be required. We also predicted that improvements would be seen in the capital by 8 May that might allow social distancing measures to be relaxed – which they were in the prime minister’s announcement on 10 May. To date our predictions have been accurate to within a day or two, so there is a predictive validity to our models that the conventional ones lack.

What do your models say about the risk of a second wave?The models support the idea that what happens in the next few weeks is not going to have a great impact in terms of triggering a rebound – because the population is protected to some extent by immunity acquired during the first wave. The real worry is that a second wave could erupt some months down the line when that immunity wears off.

the important message is that we have a window of opportunity now, to get test-and-trace protocols in place ahead of that putative second wave. If these are implemented coherently, we could potentially defer that wave beyond a time horizon where treatments or a vaccine become available, in a way that we weren’t able to before the first one.

We’ve been comparing the UK and Germany to try to explain the comparatively low fatality rates in Germany. The answers are sometimes counterintuitive. For example, it looks as if the low German fatality rate is not due to their superior testing capacity, but rather to the fact that the average German is less likely to get infected and die than the average Brit. Why? There are various possible explanations, but one that looks increasingly likely is that Germany has more immunological “dark matter” – people who are impervious to infection, perhaps because they are geographically isolated or have some kind of natural resistance

Any other advantages?Yes. With conventional SEIR models, interventions and surveillance are something you add to the model – tweaks or perturbations – so that you can see their effect on morbidity and mortality. But with a generative model these things are built into the model itself, along with everything else that matters.

Are generative models the future of disease modelling?That’s a question for the epidemiologists – they’re the experts. But I would be very surprised if at least some part of the epidemiological community didn’t become more committed to this approach in future, given the impact that Feynman’s ideas have had in so many other disciplines.