Air-burning plasma thruster may be competitive with jet engines.

Regulatory “flexibility” was never meant to allow fraud, agency says.

A mutation in the virus seems to be getting more common, but we don't know why.

Ex-official alleges cronyism, says warnings about supply shortages were ignored.

A new paper analyzes what we know about the sample the probe grabbed last year.

Caddis fly larvae typically construct protective cases out of sand grains and silk.

On a 9,288km journey inspired by the centennial anniversary of the railway’s completion in 1916, photographer Annie Ling captures life onboard the Trans-Siberian Railway, and beyond the carriage window

Map-makers insert fake towns or trap-streets to catch out plagiarists, but Agloe, in New York state, took on a strange life of its own

In 2008, Argleton village in west Lancashire appeared on Google, complete with weather reports, a job site and an estate agent advertising houses for sale. Argleton vanished two years later. While its site was – and still is – a damp field in the middle of nowhere, it’s worth noting that Argleton is an anagram of G Not Real. Although Google never admitted to having created it, Argleton was a phantom settlement, planted as a trap.

In the world of digital mapping and cartography, snares to catch unwary plagiarists take the form of fake roads or places, known as “trap streets” or “paper towns”. For some, such as Lye Close or Noereal Road, the clue is in the name. (A real alleyway in Cardiff that served as a trap street in the 2014 Dr Who episode Face the Raven may, conversely, be the world’s only fictional fictional street.)

With no alternative but to explore the nature on their doorstep, three writers describe the joy of enforced slow travel

It is a place I’d discovered before the virus: a left-hand bend in a narrow stream, a couple of steps off the footpath. There is nothing remarkable there, or not at first glance. There are breeze blocks in the stream bed and plastic bags deeply embedded in the roots of an alder tree. With a few variations, it could be anywhere in Britain: the neglected corner of a city park, the back of a private garden, behind a national park cafe. It’s just one of those spots that no one ever thinks to stop at and, if not for Covid-19, I would not have begun visiting daily, pausing for a few breaths before continuing. I saw the first snowdrops appear there, followed by primroses; then they were swamped by wild garlic and wood anemone. One morning a weasel shot out of a hole under a root and sprinted up the opposite bank. It was the first of several surprises.

Brenda Francis settled into the Kingdom Hall in Calhoun, Georgia, in mid-March, surrounded by dozens of familiar faces. Signs cautioning against shaking hands and hugging were posted around the room. It felt weird to her but was certainly understandable with the threat of an outbreak looming. She herself already had stocked up on some masks and gloves.When it came time for members to comment on the Bible readings, Francis noticed the microphones typically passed around the room were now attached to the end of long poles.That was the moment Francis, a 69-year-old widow living in a small, semirural community in the South, realized just how dramatically the coronavirus pandemic was about to reshape her spiritual life, more than anything ever had in the 47 years since she was baptized as a Jehovah's Witness.A few days after the boom mics came out in the Kingdom Hall, word came down from the group's headquarters that, in the interest of safety, Jehovah's Witnesses should stop witnessing, its practice of in-person attempts at converting people to the group."People would be so receptive right now," she said of her ministry, "and we can't knock on doors."Across the country, most religious groups have stopped coming together in large numbers to pray and hold services, in keeping with stay-at-home orders. They have improvised with online preaching and even drive-in services as the faithful sit in cars. Mormons have stopped going door to door in the United States and called home many missionaries working abroad.Jehovah's Witnesses -- with 1.3 million U.S. members who hand out brochures on sidewalks and subway platforms and ring doorbells -- are one of the most visible religious groups in the nation. Members are called on to share Scriptures in person with nonmembers, warning of an imminent Armageddon and hoping to baptize them with the prospect of living forever.The decision to stop their ministries was the first of its kind in the nearly 150 years of the group's existence. It followed anguished discussions at Watchtower headquarters, with leaders deciding March 20 that knocking on doors would leave the impression that members were disregarding the safety of those they hoped to convert."This was not an easy decision for anybody," said Robert Hendriks, the group's U.S. spokesman. "As you know, our ministry is our life."It was for Francis, who became a Jehovah's Witness when she was in her 20s with a newborn and a member knocked on her door in Tennessee and persuaded her to attend a Kingdom Hall meeting. She converted. Her family was angry that she no longer came to holiday gatherings; the group doesn't believe in celebrating holidays or birthdays. Jehovah's Witnesses became her new family.The more she studied the Bible, the more she came to believe it led to eternal life. She needed to spread the word.Showing up cold on someone's doorstep didn't come naturally. She was so shy that once, she recalled, her high school principal -- "this huge Goliath guy" -- stood on her foot in a crowded hallway; she didn't say a word but waited in pain for him to move. She had considered a career going door to door as a Mason Shoes saleswoman, but after receiving a catalog, she never mustered the courage to even try to make a sale.To her, witnessing was different. Her faith had helped her stop smoking. It gave her meaning. She had seen people clean up their lives after attending meetings at Kingdom Hall."By the time I did go to doors, I was so convinced this was the right thing to do that I had no nervousness," Francis said.Through the years, she learned to build her pitch around a theme -- a Bible verse or a current event -- and tried not to sound rehearsed."You don't want to sound like a robot," she said. "You work from the heart. You want enthusiasm."Early this year, Francis had been seeing reports on Facebook about the virus sweeping through Wuhan, China. The host of a show she watched on YouTube, Peak Prosperity, had been warning that the outbreak could spread internationally.She bought masks and face shields, just in case. She started using plastic grocery bags to cover the gas pump handle when she filled up her tank.By early March, the virus still hadn't hit Gordon County, where Francis lives. But the possibility was weighing on her mind. The message on her favorite YouTube show was getting more dire as the host, Chris Martenson, a financial guru-turned-pandemic early warner, ratcheted up his pleadings for viewers to prepare themselves.Francis' 27-year-old granddaughter has a compromised immune system. As a senior citizen, she herself was vulnerable. She did what she always has done and channeled her own feelings into her door-knocking ministry. Do you think, she would ask people as she carpooled with other members to canvass the county, that the virus is a sign of the end of the world?"No one was paying much attention," she said.Elsewhere, in places like New York where infections were starting to climb, Jehovah's Witnesses members were feeling the pinch on their ministries.One of them, Joe Babsky, had been easing into conversations with members of his Planet Fitness gym in the Bronx for weeks. He knew them by first name only: Jerry, who had lost more than 100 pounds; Jason, who seemed to spend an hour on each body part; Bernie, a 78-year-old who was more fit than men half his age. Babsky had shown a few of them Bible verses and had made progress recently with Bernie discussing the logic behind the existence of an intelligent creator.Then the gym closed."All those conversations and others were cut short," Babsky said.Life continued as normal in Francis' town of Calhoun. She was convinced things were about to change, but she was too embarrassed to wear a mask -- until an encounter in Costco when a passing shopper coughed without covering her mouth.In mid-March, her Kingdom Hall meetings went virtual. Members logged into Zoom to share Bible Scriptures. Francis settled on one that she thought would resonate as she knocked on doors in her neighborhood across the county, which had by then registered a handful of COVID-19 cases.At the doorstep, Francis would start her pitch by asking people if they could make one thing in the world go away, what would it be? If the answer had to do with the pandemic, she would recite a couple of verses from the book of Luke:"There will be great earthquakes, and in one place after another food shortages and pestilences; and there will be fearful sights and from heaven great signs."All the signs were clear, she would announce. Armageddon was near. Her message finally seemed to be resonating with people.And then she got word to stop knocking on doors."This has been so much a part of our lives, so it was like, wow," she said. "I have often envisioned in paradise where going door to door would not be a thing because everyone knows God."This was not paradise.But Francis was convinced that the end of the world was not far away. There were just too many signs, she said. And so she and many other Jehovah's Witnesses members were more compelled than ever to witness any way they could. Many began writing letters or making phone calls to anyone whose numbers they had managed to collect before the pandemic hit.Masked and gloved, Francis hands out pamphlets and cards with her phone number on them to fellow shoppers at the grocery store.Last week, she sent a text to a woman in Hawkinsville, Georgia, a few miles away, whom she had been contacting from time to time. The woman said her restaurant had to close because of the pandemic and her brother-in-law was sick with the virus. A couple of days later he died.Francis texted Scriptures to the woman and told her that soon all the sickness on Earth would be over; all sins would be forgiven; paradise was near.The next day she received a written response: "Thank you so much for the information. It was such a comfort."This article originally appeared in The New York Times.(C) 2020 The New York Times Company

On Monday, officials in Los Angeles County released preliminary results of a study that suggest roughly 4.1% of the county's adult population has already had the coronavirus, which translates to between 221,000 and 442,000 people, factoring in adjustments for statistical margin of error.That's a much higher number than confirmed case counts indicate. (As of early Tuesday, the county had 13,816 cases.)"We haven't known the true extent of COVID-19 infections in our community because we have only tested people with symptoms and the availability of tests has been limited," Neeraj Sood, a professor of public policy at the University of Southern California and lead investigator on the study, said in a statement.Dr. Barbara Ferrer, LA County's public health director, said in a statement that the early results pointed to the possibility that many people may have been unknowingly infected.The study relies on rapid antibody tests, which have faced concerns about accuracy.And as The Mercury News reported, a Stanford study that also showed higher rates of infection in Santa Clara County drew criticism, although that was largely from statisticians over the study's methodology.Still, experts have emphasized that more studies will help develop a clearer picture of the virus's true prevalence.In any case, officials say it's crucial to continue to adhere to public health orders for many reasons, including that if more people are infected but asymptomatic, they could unknowingly spread the virus.______A change to the USNS Mercy's assignmentOn Monday, my New York Times colleague John Ismay and I spoke with leaders aboard the Navy hospital ship Mercy. Here's our dispatch about how their assignment has changed:In the weeks since the Mercy arrived at the Port of Los Angeles from San Diego, the hospital ship's mission has been clear: Serve as a crucial relief valve for patients who have not been infected with the coronavirus as hospitals fill up with patients sick with COVID-19.In recent days, the work has shifted, but that underlying goal has remained the same, the commanding officer of the ship's medical facility told us."FEMA, after having made an assessment of the situation and the local needs, has changed our assignment," said Capt. John Rotruck, the medical treatment team's commanding officer.The Mercy has sent 40 medical staff members -- two family practice doctors, 16 nurses and 20 corpsmen, including two respiratory technicians -- to help care for patients who do not have COVID-19 at a state-run skilled nursing facility in Orange County."We're essentially augmenting their staff," Rotruck said, as the anticipated surge in COVID-19 hospitalizations has, for now, been held at bay.The capacity onboard will decrease to 250 beds from 1,000, in large part as a result of that staffing shift -- although officials emphasized that leaves more than enough space at the rate the Mercy has been taking in patients.At the same time, leaders aboard the Mercy said that most of the military crew is moving off the ship to stay at nearby hotels to make it possible for crew members to keep their distance from one another as they work, eat and sleep.Sailors will be bused from their hotels to work their shifts aboard the ship.The move, which will decrease the number of crew members staying aboard the ship to roughly 140 from more than 800, came as the number of crew members who may have been exposed inched upward.By Monday, Rotruck said that nine crew members had tested positive for the coronavirus and that about 130 people were in quarantine because they had come into what federal officials define as close contact with at least one of those nine. All of those in quarantine tested negative.All nine who have COVID-19 were outpatients as of Monday -- meaning their cases were not severe enough to warrant being hospitalized -- and their conditions are being closely monitored.Rotruck said that moving crew members off the Mercy was unusual but not unprecedented.During a previous mission, for instance, some medical staff members flew to Vietnam to provide medical care to patients on the Mercy, although they did not sleep on the ship.However, Rotruck added, "We have not done it to this scale," with the vast majority of the ship's crew members living ashore.A spokesman said Friday that the crew aboard the Navy hospital ship Comfort, which is docked in New York City, recently moved most of its crew to hotels ashore as well.Rotruck said that the Mercy was ready to care for coronavirus-negative seniors living in nursing homes, as the governor has previously announced, but none had been transferred yet.Such nursing home patients may be moved to the Mercy for care through the typical intake process, if, for example, a facility needed to free up space to care for COVID-19 patients.As of Monday evening, the ship had taken in 65 patients total since it docked in San Pedro, and its crew had performed 22 surgeries. There were 13 patients still being treated onboard, meaning that 52 had been discharged.This article originally appeared in The New York Times.(C) 2020 The New York Times Company

A satellite mission that bounces laser light off the ice sheets of Antarctica and Greenland has found that hundreds of billions of tons' worth of ice are being lost every year due to Earth's changing climate. Scientists involved in NASA's ICESat-2 project report in the journal Science that the net loss of ice from those regions has been responsible for 0.55 inches of sea level rise since 2003. That's slightly less than a third of the total amount of sea level rise observed in the world's oceans over that time. To track how the ice sheets are changing, the ICESat-2… Read More

Scientists are working on better solar cells that will turn more of the sun's rays into electricity.

Certain habitats can help dampen the spread of ash dieback, which threatens ash trees.

As Elon Musk's Starlink and Jeff Bezos's Project Kuiper race to create high-speed internet using satellites orbiting Earth, there's a small problem that could get in the way: debris. From dead spacecraft that have been around since the dawn of the space age to flecks of paint smashing windows on the International Space Station, rubbish is clogging up our orbits. And with objects moving as fast as 15,500mph (25,000 kmph), the satellite services we've come to depend on are at constant risk of collision. So how to fix the problem with junk in space? Ian Anderson investigates

Australian photographer Christian Bowman from Queensland was among Australians waking up before the sun rose to capture images of the Eta Aquarids meteor shower

• Australians told to look to the skies early Wednesday for best views

Letter seeks to dispel view that Prof Neil Ferguson was single architect of lockdown idea

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A group of leading UK scientists have insisted that the scientific basis for the coronavirus lockdown is the work of a large group of experts, and that epidemiologist Prof Neil Ferguson is just one voice among many.

In a letter co-ordinated by Dr Thibaut Jombart, an associate professor at the London School of Hygiene and Tropical Medicine, more than 25 prominent scientists said debates after Ferguson’s “individual error” – in which he flouted lockdown rules by receiving visits at home from his lover – had amplified a misconception that he alone persuaded the government to change policy.

Airport’s boss says global standard for screening is crucial to restoring confidence

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Heathrow will start using thermal cameras to carry out temperature checks on passengers within the next fortnight, as it called for common health screening standards around the world for air travellers.

The UK’s busiest airport said it would trial thermal cameras capable of monitoring the temperature of people in the immigration halls, initially in Terminal 2.

A man whose wife was killed in the April mass shooting in Nova Scotia is the plaintiff named in a proposed class-action lawsuit against the estate of the deceased gunman, denturist Gabriel Wortman.

Lethbridge police are being investigated by an outside force after handcuffing a woman in a stormtrooper costume outside a Star Wars-themed business earlier this week. But still the force faces accusations that not enough is being done to investigate what happened.

Danish Chagani was excited when the lawyer who lived down the hall from his Toronto condo wanted to rent his unit after he bought a house for his young family. But the first-time landlord says the feeling was short-lived.

Mother's Day is coming up, but it doesn't feel quite right for Dawn Degeus. The 39-year-old mother from Ancaster, Ont., will try to celebrate while one of her two kids actively avoids her.

Federal investigators have found “reasonable grounds” that a government whistleblower was punished for speaking out against widespread use of an unproven drug that President Donald Trump touted as a remedy for COVID-19, his lawyers said. Dr. Rick Bright headed the Biomedical Advanced Research and Development Authority, a unit of Department of Health and Human Services that focuses on countermeasures to infectious diseases and bioterrorism. The OSC is an agency that investigates allegations of egregious personnel practices in government.

The Senate failed to override President Trump's veto of legislation that would have prevented him from taking military action in Iran without congressional approval. On Thursday, the Senate voted 49-44 in favor of the override, falling short of the two-thirds majority needed for it to be approved. Both chambers of Congress passed the bipartisan resolution earlier this year.

The Senate failed to override President Trump's veto of legislation that would have prevented him from taking military action in Iran without congressional approval. On Thursday, the Senate voted 49-44 in favor of the override, falling short of the two-thirds majority needed for it to be approved. Both chambers of Congress passed the bipartisan resolution earlier this year.

The decision to shelve detailed advice from the nation’s top disease control experts for reopening communities during the coronavirus pandemic came from the highest levels of the White House, according to internal government emails obtained by The Associated Press. The files also show that after the AP reported Thursday that the guidance document had been buried, the Trump administration ordered key parts of it to be fast-tracked for approval. It included detailed “decision trees,” or flow charts aimed at helping local leaders navigate the difficult decision of whether to reopen or remain closed.

Egypt’s President Abdel-Fattah el-Sissi has approved amendments to the country's state of emergency that grant him and security agencies additional powers, which the government says are needed to combat the coronavirus outbreak. An international rights group condemned the amendments, saying the government has used the global pandemic to “expand, not reform, Egypt’s abusive Emergency Law.” The new amendments allow the president to to take measures to contain the virus, such as suspending classes at schools and universities and quarantining those returning from abroad.

President Vladimir Putin told Russians they are "invincible" when they stand together as the country on Saturday marked the 75th anniversary of the end of World War II in lockdown from the coronavirus. With cases surging and authorities urging Russians to stay in their homes, celebrations of this year's Victory Day were muted after the Kremlin grudgingly postponed plans for a grand parade with world leaders. Instead of columns of military hardware and thousands of troops marching through Red Square as planned, Putin walked alone to lay flowers at the Eternal Flame outside the red brick walls of the Kremlin.

No, you should not CC the CEO on every email you send.

Form requires sensitive data, including driver’s license and voided check scan.

There's a scramble to adapt to a world where people routinely cover their faces.

Firings highlight “toxicity running through the company culture,” Bray said.

Pandemic disrupts broadband progress as cities halt construction.

The agreement would be the latest effort to cultivate allies around NASA’s plan to put humans and space stations on the moon within the next decade, and comes as the civilian space agency plays a growing role in implementing American foreign policy.

The slowing economy due to COVID-19 has allowed solar, wind and hydro power to overtake coal-fired power.

It’s still joyous, and moving online has made it even more inclusive. 

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Stoked by divisive politics preying on ignorance, the threat grows and victims mount. 

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Some 30,000 patients added to waitlist as hospital beds held open for possible pandemic surge. 

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Received wisdom doesn't hold up in pandemics, experts say

Imaging specialist produces clearest pictures yet from dramatic Nasa mission

Comet had prompted excitement as astronomers expected it to be visible to the naked eye – but it has since broken up and is getting dimmer

Latest study on nitrogen dioxide reinforces earlier research linking air pollutants and Covid-19 deaths

Covid-19 could be 'antidote to complacency' among those on the fence about vaccines, scientists say

Humans can easily forget that the cities and towns they call home and frequently visit are also home to wild animals, writes Sandra E Garcia. In Wales, goats roam the streets, while in San Francisco the Coyotes have come out

Infowars founder Alex Jones among conspiracy theorists sowing doubts about pandemic

'This type of natural manipulation in ecosystems ... has barely been researched to date, but holds tremendous potential,' says researcher

Scientists have created glowing flowers after editing the DNA of a plant.

The company has submitted an application to the Gas and Electricity Markets Authority "authorising it to generate electricity"

Researchers suggest unusual rapid shift is due to competing patches of magnetic field