Opening windows and doors “one of the best ways” to remove Covid-19 from classroom air

Opening windows and doors “one of the best ways” to remove Covid-19 from classroom air

One of the best ways to reduce the likelihood of Covid-19 being transmitted in Aotearoa New Zealand classrooms is simply by opening doors and windows to create natural ventilation, say NIWA air quality experts.

SpaceX's Inspiration4 Returns After 3 Days in Orbit

SpaceX's Inspiration4 Returns After 3 Days in Orbit

After spending three days about 360 miles above the ground, the all-civilian crew of SpaceX’s Inspiration4 have returned to Earth.The crew kept busy while orbiting the Earth 15 times a day: Isaacman kept track of the spacecraft’s systems and kept in touch with mission control.

How to Watch the SpaceX Inspiration4 Launch

How to Watch the SpaceX Inspiration4 Launch

On the Florida coast, at Launch Complex 39A at NASA’s Kennedy Space Center, the SpaceX team is readying the historic Inspiration4 mission for liftoff.The Inspiration4 crew have a five-hour launch window that opens at 8:02 pm Eastern on Wednesday night.

Epic Leaves a Big Crack in Apple’s Walled Garden

Epic Leaves a Big Crack in Apple’s Walled Garden

On Friday, after a contentious legal battle over Apple’s alleged monopoly power over the iOS ecosystem, a California judge snipped the tug-of-war rope between Apple and Epic Games.And Apple must change its App Store rules to allow developers to use other payment systems⁠—a blow to Apple’s iron grip on the iOS ecosystem.

Hurricane Ida: What It'll Take for New Orleans to Restore Power

Hurricane Ida: What It'll Take for New Orleans to Restore Power

Those repeated disasters mean that utilities have a recovery playbook for storms like Ida. But knowing what order to run those plays in depends entirely on the unique conditions left behind by each hurricane—which regions remain inaccessible for days due to flooding, and which specific components of the system need extensive repairs.

A New Vaccination Goal, a Hasty Return to ‘Normal,’ and More Coronavirus News

A New Vaccination Goal, a Hasty Return to ‘Normal,’ and More Coronavirus News

President Biden sets a new vaccination goal, Europe curbs its vaccine exports, and experts caution against a hasty return to “normal.” Here’s what you should know: Want to receive this weekly roundup and other coronavirus news?

5 Ways 'Assassin's Creed Valhalla' Falls Short of Greatness

5 Ways 'Assassin's Creed Valhalla' Falls Short of Greatness

It’s an enormous open-world action RPG that casts you as Eivor of the Raven Clan, on a mission to conquer England during the Dark Ages.Like most open-world games today, Valhalla tries to do far too much, and in the process stretches itself too thin.

We Still Don’t Know How Well Covid Vaccines Stop Transmission

We Still Don’t Know How Well Covid Vaccines Stop Transmission

And because infections—especially asymptomatic ones—are more likely to be detected in the group that’s testing more frequently, the estimated 89.4 percent transmission-blocking effect of the vaccine is almost certainly too optimistic (a caveat the authors acknowledged, saying more research is needed to confirm their findings).

How to Watch NASA's Perseverance Mars Rover Landing

How to Watch NASA's Perseverance Mars Rover Landing

And the experiments get power from a battery that continuously recharges with US-made plutonium fuel .Since July, as Perseverance has been cruising toward Mars, the numerous antennae aboard have been pinging high-frequency signals to engineers back on Earth.

The LA Musician Who Designed a Microphone for Mars

The LA Musician Who Designed a Microphone for Mars

Embedded on the rover is a small microphone that, if all goes well, will record the sounds of the descent and, later, the martian environment itself, something no Mars probe has yet achieved.NASA Just Launched Its New Perseverance Rover to Mars.

We Need a Global Outbreak Investigation Team—Now

We Need a Global Outbreak Investigation Team—Now

The most significant detail the group added was its apparent dismissal of the controversial laboratory release hypothesis , which Ben Embarek called “extremely unlikely.” The declaration was a boost to Beijing’s version of events, which has peddled unsubstantiated claims that SARS-CoV-2 could have originated outside of China, and kicked off a new round of geopolitical bickering over who should shoulder the blame for Covid-19 becoming a global pandemic.

NASA Wants to Set a New Radiation Limit for Astronauts

NASA Wants to Set a New Radiation Limit for Astronauts

Under the existing standard, some veteran astronauts might have been excluded from longer-term space missions because they are bumping up against lifetime radiation limits.But NASA doesn’t have much data on the health effects of radiation from space on its astronauts.

American Cities Are Way Underreporting Their Carbon Footprints

American Cities Are Way Underreporting Their Carbon Footprints

City officials build what’s called self-reported inventories, or SRIs, to get an idea of local emission levels.According to Gurney, officials there were incorporating retail sales from gas stations in the city’s SRI calculation, which is usually a perfectly reasonable way to estimate emissions from local vehicles.

February’s Gonna Be a Big Month for Mars

February’s Gonna Be a Big Month for Mars

On February 9, the United Arab Emirates’ Hope spacecraft is expected to enter orbit around Mars after a six-month, 300-million-mile journey from Earth.China’s space agency has been quiet about its plans for visiting the Red Planet, but the craft is expected to attempt a landing shortly after it achieves orbit.

Wikipedia's Biggest Challenge Awaits in 2021

Wikipedia's Biggest Challenge Awaits in 2021

Yet as Wikipedia begins a new year with a burnished reputation as a trusted, fact-based resource, it faces thorny questions beyond accuracy that threaten its grand, encyclopedic mission: Can the community of editors and administrators who collect and present the facts become as sturdy and reliable as the facts themselves?

Uber Faces a Fine for Refusing to Give Details on Assaults

Uber Faces a Fine for Refusing to Give Details on Assaults

"The CPUC has been insistent in its demands that we release the full names and contact information of sexual assault survivors without their consent," Uber said in a statement on Monday.

How NASA Scrambled to Save OSIRIS-REx From Leaky Disaster

How NASA Scrambled to Save OSIRIS-REx From Leaky Disaster

Another possibility, given the surprisingly viscous surface material, is that the regolith’s soft, malleable rocks wedged into the Mylar flap opening and weren’t able to make it all the way into the head, Moreau says.

For the Second Time Ever, an Asteroid Sample Returns to Earth

For the Second Time Ever, an Asteroid Sample Returns to Earth

As the first spacecraft to visit a carbonaceous asteroid, Hayabusa2 can help determine the provenance of meteorites discovered on Earth and shed some light on the processes that formed the organic compounds in the early solar system.“Are there samples of the organics that we don’t have in our collection because they didn’t survive going through the atmosphere?

Two Global Efforts Try to Trace the Origin of the Covid Virus

Two Global Efforts Try to Trace the Origin of the Covid Virus

“This is not a simple case of going to a market and picking up samples and testing,” says Peter Daszak, the president of the nonprofit research organization EcoHealth Alliance, who leads the Lancet commission task force.

Does the AstraZeneca Vaccine Also Stop Covid Transmission?

Does the AstraZeneca Vaccine Also Stop Covid Transmission?

Researchers at Oxford also told reporters Monday that testing showed the vaccinated group in the UK had fewer asymptomatic infections, which means they'd be less likely to unwittingly spread the disease themselves.

A Solar-Powered Rocket Might Be Our Ticket to Interstellar Space

A Solar-Powered Rocket Might Be Our Ticket to Interstellar Space

“It’s really easy for someone to dismiss the idea and say, ‘On the back of an envelope, it looks great, but if you actually build it, you're never going to get those theoretical numbers,’” says Benkoski, a materials scientist at the Applied Physics Laboratory and the leader of the team working on a solar thermal propulsion system.

A Facebook Messenger Flaw Could Have Let Hackers Listen In

A Facebook Messenger Flaw Could Have Let Hackers Listen In

Discovered by Natalie Silvanovich of Google's Project Zero bug hunting team , the vulnerability, which is now patched, could have been exploited on Messenger for Android if an attacker simultaneously called a target and sent them a specially crafted, invisible message to trigger the attack.

Star Wars: Squadrons Explores the Changing Face of Fascism

Star Wars: Squadrons Explores the Changing Face of Fascism

Though the New Republic is just as diverse, if not more so, and the character options for both sides of the conflict feature more minority characters than not, it’s particularly striking to see the classically white, male Empire being run by women of color, commanding diverse squadrons and answering to no one but themselves.

It’s Time to Talk About Covid-19 and Surfaces Again

It’s Time to Talk About Covid-19 and Surfaces Again

Berman was aware of the practical issues raised by putting books in purgatory for so long, but she had a broader concern: that all this research was encouraging an undue fixation, or even a fear, of the objects librarians are meant to joyfully share with the public.

How to Build a Spacecraft to Save the World

How to Build a Spacecraft to Save the World

There are more than a thousand asteroids with diameters larger than Didymos and Dimorphos combined, and if any of those were to strike Earth, it could lead to mass extinction and the collapse of civilization.“Everyone knows it’s possible to hit an asteroid,” says Justin Atchison, a DART mission designer at the Johns Hopkins Applied Physics Laboratory.

Those ‘Doomsday Planes’ Have Nothing to Do With Trump's Covid-19 Test

Those ‘Doomsday Planes’ Have Nothing to Do With Trump's Covid-19 Test

Instead, both communication relay planes and the submarines themselves must be equipped with massive antennas, and even then VLF systems are still extremely low-latency, low-bandwidth, and low-throughput, meaning it takes a long time to send very small amounts of data.

The Android 11 Privacy and Security Features You Should Know

The Android 11 Privacy and Security Features You Should Know

When an app first asks for permission to track location, the option to enable this all the time (even when the app isn't running) isn't available: You need to visit the app's specific page in Android Settings to do this.

Democracy Will Only Work If the Social Media Giants Grow Up

Democracy Will Only Work If the Social Media Giants Grow Up

With more Americans than ever working, going to school, and gathering online, social media platforms have an urgent responsibility to step up in order to ensure the integrity of this election.

Human Embryo Gene Editing Gets a Road Map—Not a Green Light

Human Embryo Gene Editing Gets a Road Map—Not a Green Light

So, of course, they thought about the possibility that one day someone might use such tools to alter human genes, even human germlines—making changes to people’s DNA that they’d pass on to future generations.

The Flagrant Hypocrisy of Bungled College Reopenings

The Flagrant Hypocrisy of Bungled College Reopenings

Institutions had to convey that they were fully considering the seriousness of Covid-19 and propose plans for their students to receive the high-caliber education that was already promised and paid for.