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I want to make three arguments here. Imitation is not just some new minor ability. It changes everything. It enables a new kind of evolution. The first is that humans are unique because they are so good at imitation. When our ancestors began to imitate they let loose a new evolutionary process based not on genes but on a second replicator, memes. Genes and memes then coevolved, transforming us into better and better meme machines. The second is that one kind of copying can piggy-back on another: that is, one replicator (the information that is copied) can build on the products (vehicles or interactors) of another. This multilayered evolution has produced the amazing complexity of design we see all around us. The third is that now, in the early 21st century, we are seeing the emergence of a third replicator. I call these temes (short for technological memes, though I have considered other names). They are digital information stored, copied, varied and selected by machines. We humans like to think we are the designers, creators and controllers of this newly emerging world but really we are stepping stones from one replicator to the next.

could any of our modern meme products take the step our hominid ancestors did long ago and begin a new kind of copying? Yes. They could and they are. Our computers, all linked up through the Internet, are beginning to carry out all three of the critical processes required for a new evolutionary process to take off.

This is a radically new kind of copying, varying and selecting, and means that a new evolutionary process is starting up. This copying is quite different from the way cells copy strands of DNA or humans copy memes. The information itself is also different, consisting of highly stable digital information stored and processed by machines rather than living cells. This, I submit, signals the emergence of temes and teme machines, the third replicator.

On the day my daughter first tested positive, my 11-year-old son announced that he wasn’t feeling well and began developing classic coronavirus symptoms: headache, fatigue, sore throat, runny nose. My husband followed two days later with a sore throat and stuffy nose. Yet despite testing daily for seven days straight, my husband and son never tested positive for Covid-19 — including on PCR tests administered on my son’s fifth day of symptoms, and my husband’s third. (And yes, we did some throat swabs, too.)

I called experts in immunology, microbiology and virology to get their take.

And this rapid response changes everything about what happens next.

Why was the second wave, in late 1918, so much deadlier than the first wave, in the spring? These rediscovered lung samples hint at the possibility that the virus itself changed to better infect humans.

This new study brings the number of complete 1918 flu genomes to a grand total of three, plus some partial genomes.

Several changes showed up in the flu’s genome-replication machinery, a potential evolutionary hot spot because better replication means a more successful virus. The team then copied just the replication machinery of the 17-year-old’s virus—not the entire virus—into cells and found it was only half as active as that of the flu virus found in Alaska.

I spoke to Mina about what seeing Covid as a textbook virus tells us about the nature of the pandemic off-ramp — and about everything else we should’ve known about the disease from the outset.

you can get exposed or you can get vaccinated. But either way, we have to keep building our immune system up, as babies do. That takes years to do. And I think it’s going to be a few more years at least.

And in the meantime?We’ve seen a dramatic reduction in mortality. We’ve even seen, I’d say, a dramatic decline in rates of serious long Covid per infection.

For the last few years, though, I’ve felt the opposite — that so much of my work was decrying bad choices made by big players

Vladimir Putin’s tightening dictatorship and aggression, culminating in his brutal invasion of Ukraine; Xi Jinping’s reversal of China’s opening; Israel’s election of the most right-wing government in its history; the cascading effects of climate change; the loss of control over America’s southern border; and, maybe most ominously, an authoritarian drift, not only in European countries like Turkey, Poland and Hungary but in America’s own Republican Party as well.

If I think about the three pillars that have stabilized the world since I became a journalist in 1978 — a strong America committed to protecting a liberal global order with the help of healthy multilateral institutions like NATO, a steadily growing China always there to buoy the world economy, and mostly stable borders in Europe and the developing world — all three are being shaken by big choices by big players over the last decade

Wearing a face mask is certainly not an iron-clad guarantee that you won’t get sick – viruses can also transmit through the eyes and tiny viral particles, known as aerosols, can penetrate masks. However, masks are effective at capturing droplets, which is a main transmission route of coronavirus, and some studies have estimated a roughly fivefold protection versus no barrier alone (although others have found lower levels of effectiveness).

All viruses accumulate mutations over time and the virus that causes Covid-19 is no different. How widespread different strains of a virus become depends on natural selection – the versions that can propagate quickest and replicate effectively in the body will be the most “successful”. This doesn’t necessarily mean most dangerous for people though, as viruses that kill people rapidly or make them so sick that they are incapacitated may be less likely to be transmitted.

The team behind this research suggested that this may indicate the L strain is more “aggressive”, either transmitting more easily or replicating faster inside the body. However, this theory is speculative at this stage – there haven’t yet been direct comparisons to see whether people who catch one version of the virus are more likely to pass it on or suffer more severe symptoms.

We don’t know how quickly machines will displace people’s jobs, or how many they’ll take, but we know it’s happening — not just to factory workers but also to money managers, dermatologists and retail workers.

The logical response seems to be to educate people differently, so they’re prepared to work alongside the robots or do the jobs that machines can’t. But how to do that, and whether training can outpace automation, are open questions.

Pew Research Center and Elon University surveyed 1,408 people who work in technology and education to find out if they think new schooling will emerge in the next decade to successfully train workers for the future. Two-thirds said yes; the rest said n

Back in the spring, most scientists, including Anthony Fauci, the top infectious-disease expert in the U.S., predicted that a vaccine would take at least 12–18 months to deliver. That time frame was viewed as wildly optimistic, even reckless, given the more typical four to six, sometimes as many as 10 to 15, years that vaccine development typically requires

Today, most scientists working in infectious disease, including Fauci, are saying the United States will know whether there’s an effective COVID-19 vaccine by the end of the year or early 2021, and one could become available by the end of 2021. That incredible speed is not being accomplished at the expense of safety; rather, it is the result of unprecedented collaboration across borders, academia, and industry.

The ideal vaccine will do three things: protect individuals from becoming infected, prevent life-altering effects for those who do get COVID-19, and block transmission of the virus to others. The vaccine does not need to be 100 percent effective at all three to be a powerful addition to our defenses against this virus.

“AI will steadily be delegated, and could — as it becomes more autonomous — usurp decision making and thinking from current humans and human-run institutions,” said Anthony Aguirre, a cosmologist at the University of California, Santa Cruz and a founder of the Future of Life Institute, the organization behind one of two open letters.

“At some point, it would become clear that the big machine that is running society and the economy is not really under human control, nor can it be turned off, any more than the S&P 500 could be shut down,” he said.

Are there signs A.I. could do this?Not quite. But researchers are transforming chatbots like ChatGPT into systems that can take actions based on the text they generate. A project called AutoGPT is the prime example.

On a Monday morning in April, Sam Altman sat inside OpenAI’s San Francisco headquarters, telling me about a dangerous artificial intelligence that his company had built but would never release. His employees, he later said, often lose sleep worrying about the AIs they might one day release without fully appreciating their dangers.

He wanted me to know that whatever AI’s ultimate risks turn out to be, he has zero regrets about letting ChatGPT loose into the world. To the contrary, he believes it was a great public service.

Altman can still remember where he was the first time he saw GPT-4 write complex computer code, an ability for which it was not explicitly designed. “It was like, ‘Here we are,’ ”

Kaiser has sophisticated electronic records and computer systems that — after 10 years and $30 billion in technology spending — have led to better-coordinated patient care, another goal of the president. And because the plan is paid a fixed amount for medical care per member, there is a strong financial incentive to keep people healthy and out of the hospital, the same goal of the hundreds of accountable care organizations now being created.

Kaiser has yet to achieve the holy grail of delivering that care at a low enough cost. He says he and other health systems must fundamentally rethink what they do or risk having cost controls imposed on them either by the government or by employers, who are absorbing the bulk of health insurance costs. “We think the future of health care is going to be rationing or re-engineering,”

the way to get costs lower is to move care farther and farther from the hospital setting — and even out of doctors’ offices. Kaiser is experimenting with ways to provide care at home or over the Internet, without the need for a physical office visit at all.

he world has lately been making extraordinary progress in lifting people out of extreme poverty. Between 1990 and 2010, their number fell by half as a share of the total population in developing countries, from 43% to 21%—a reduction of almost 1 billion people.

Of the 7 billion people alive on the planet, 1.1 billion subsist below the internationally accepted extreme-poverty line of $1.25 a day.

Nobody in the developed world comes remotely close to the poverty level that $1.25 a day represents. America’s poverty line is $63 a day for a family of four. In the richer parts of the emerging world $4 a day is the poverty barrier

Propelled by the tale of the legendary Norse adventurer Ragnar Lothbrok, his family and his band of followers, the lushly produced, effects-enhanced series dazzles with evocative scenery and dynamic displays of superherolike derring-do and physical stamina.

Mr. Hirst immersed himself in what had been written about Viking culture — basically documentation by outside observers since theirs was an illiterate society. He found the material limited and biased.

“They’re always the guys who break in through the door, slash up your house and rape and pillage for no good reason, except that they enjoy the violence,” he said. “I wanted to tell the story from the Vikings’ point of view, because their history was written by Christian monks, basically, whose job it was to exaggerate their violence.”

picture yourself in our grandchildren’s time, a century hence. Significant global warming has occurred, as scientists predicted. Nature’s longstanding, repeatable patterns — relied on for millenniums by humanity to plan everything from infrastructure to agriculture — are no longer so reliable. Cycles that have been largely unwavering during modern human history are disrupted by substantial changes in temperature and precipitation.

As Earth’s warming stabilizes, new patterns begin to appear. At first, they are confusing and hard to identify. Scientists note similarities to Earth’s emergence from the last ice age. These new patterns need many years — sometimes decades or more — to reveal themselves fully, even when monitored with our sophisticated observing systems

Disruptive societal impacts will be widespread.

It appears to be the first time the United States has repeatedly used cyberweapons to cripple another country’s infrastructure, achieving, with computer code, what until then could be accomplished only by bombing a country or sending in agents to plant explosives.

If Olympic Games failed, he told aides, there would be no time for sanctions and diplomacy with Iran to work. Israel could carry out a conventional military attack, prompting a conflict that could spread throughout the region.

Iran’s president, Mahmoud Ahmadinejad, took reporters on a tour of the plant and described grand ambitions to install upward of 50,000 centrifuges. For a country with only one nuclear power reactor — whose fuel comes from Russia — to say that it needed fuel for its civilian nuclear program seemed dubious to Bush administration officials.

Mr. Bo’s policies from 2007 to 2012 as the party secretary in the megacity of Chongqing replicated many of the methods Mao used to mobilize and govern the Chinese people.

Like Mao, Mr. Bo used mass campaigns and grass-roots mobilization to deal with the party’s governance problems.

Mr. Bo also initiated his own Mao-like “great leap forward” for economic development in Chongqing to win over the poor.