Science & Technology
Mars rover captures 1st sound of dust devil on red planet
What’s a dust devil sound like on Mars? A NASA rover by chance had its microphone on when a whirling tower of red dust passed directly overhead, recording the racket.
It’s about 10 seconds of not only rumbling gusts of up to 25 mph (40 kph), but the pinging of hundreds of dust particles against the rover Perseverance. Scientists released the first-of-its-kind audio Tuesday, AP reported.
It sounds strikingly similar to dust devils on Earth, although quieter since Mars’ thin atmosphere makes for more muted sounds and less forceful wind, according to the researchers.
The dust devil came and went over Perseverance quickly last year, thus the short length of the audio, said the University of Toulouse’s Naomi Murdoch, lead author of the study appearing in Nature Communications. At the same time, the navigation camera on the parked rover captured images, while its weather-monitoring instrument collected data.
“It was fully caught red-handed by Persy,” said co-author German Martinez of the Lunar and Planetary Institute in Houston.
Photographed for decades at Mars but never heard until now, dust devils are common at the red planet. This one was in the average range: at least 400 feet (118 meters) tall and 80 feet (25 meters) across, traveling at 16 feet (5 meters) per second.
The microphone picked up 308 dust pings as the dust devil whipped by, said Murdoch, who helped build it.
Given that the rover’s SuperCam microphone is turned on for less than three minutes every few days, Murdoch said it was “definitely luck” that the dust devil appeared when it did on Sept. 27, 2021. She estimates there was just a 1-in-200 chance of capturing dust-devil audio.
Of the 84 minutes collected in its first year, there’s “only one dust devil recording,” she wrote in an email from France.
This same microphone on Perseverance’s mast provided the first sounds from Mars — namely the Martian wind — soon after the rover landed in February 2021. It followed up with audio of the rover driving around and its companion helicopter, little Ingenuity, flying nearby, as well as the crackle of the rover’s rock-zapping lasers, the main reason for the microphone.
These recordings allow scientists to study the Martian wind, atmospheric turbulence and now dust movement as never before, Murdoch said. The results”“demonstrate just how valuable acoustic data can be in space exploration.”
On the prowl for rocks that might contain signs of ancient microbial life, Perseverance has collected 18 samples so far at Jezero Crater, once the scene of a river delta. NASA plans to return these samples to Earth a decade from now. The helicopter Ingenuity has logged 36 flights, the longest lasting almost three minutes.
Science & Technology
Albania bans TikTok for a year after killing of teenager
Albania on Saturday announced a one-year ban on TikTok, the popular short video app, following the killing of a teenager last month that raised fears over the influence of social media on children.
The ban, part of a broader plan to make schools safer, will come into effect early next year, Prime Minister Edi Rama said after meeting with parents' groups and teachers from across the country, Reuters reported.
"For one year, we'll be completely shutting it down for everyone. There will be no TikTok in Albania," Rama said.
Several European countries including France, Germany and Belgium have enforced restrictions on social media use for children. In one of the world's toughest regulations targeting Big Tech, Australia approved in November a complete social media ban for children under 16.
Rama has blamed social media, and TikTok in particular, for fuelling violence among youth in and outside school.
His government's decision comes after a 14-year-old schoolboy was stabbed to death in November by a fellow pupil. Local media had reported that the incident followed arguments between the two boys on social media. Videos had also emerged on TikTok of minors supporting the killing.
"The problem today is not our children, the problem today is us, the problem today is our society, the problem today is TikTok and all the others that are taking our children hostage," Rama said.
TikTok said it was seeking "urgent clarity" from the Albanian government.
"We found no evidence that the perpetrator or victim had TikTok accounts, and multiple reports have in fact confirmed videos leading up to this incident were being posted on another platform, not TikTok," a company spokesperson said.
Science & Technology
Australia’s under-16 social media ban sparks anger and relief
Australians reacted on Friday with a mixture of anger and relief to a social media ban on children under 16 that the government says is world-leading, but which tech giants like TikTok argue could push young people to "darker corners of the internet".
Australia approved the social media ban for children late on Thursday after an emotive debate that has gripped the nation, setting a benchmark for jurisdictions around the world with one of the toughest regulations targeting Big Tech, Reuters reported.
The law forces tech giants from Instagram and Facebook owner Meta Platforms to TikTok to stop minors from logging in or face fines of up to A$49.5 million ($32 million). A trial of enforcement methods will start in January, with the ban to take effect in a year.
"Platforms now have a social responsibility to ensure the safety of our kids is a priority for them," Australian Prime Minister Anthony Albanese said on Friday
"We're making sure that mums and dads can have that different conversation today and in future days."
Announcing the details of the ban earlier this month, Albanese cited the risks to physical and mental health of children from excessive social media use, in particular the risks to girls from harmful depictions of body image, and misogynist content aimed at boys.
In Sydney on Friday, reaction to the ban was mixed.
"I think that's a great idea, because I found that the social media for kids (is) not really appropriate, sometimes they can look at something they shouldn't," said Sydney resident Francesca Sambas.
Others were more scathing.
"I'm feeling very angry, I feel that this government has taken democracy and thrown it out the window," said 58-year-old Shon Klose.
"How could they possibly make up these rules and these laws and push it upon the people?"
Children, meanwhile, said they would try to find a way around the ban.
"I feel like I still will use it, just secretly get in," said 11-year-old Emma Wakefield.
WORLD FIRST
Countries including France and some U.S. states have passed laws to restrict access for minors without a parent's permission, but the Australian ban is absolute. A full under-14s ban in Florida is being challenged in court on free speech grounds.
Albanese's Labor party won crucial support from the opposition conservatives for the bill that was fast-tracked through the country's parliament as part of 31 bills pushed through in a chaotic final day of parliament for the year.
The government has said enough notice was given as it first flagged the ban after a parliamentary inquiry earlier this year that heard testimony from parents of children who had self-harmed due to cyber bullying.
But it was criticised by social media firms and some lawmakers who say the bill has lacked proper scrutiny.
A spokesperson for TikTok, which is hugely popular with teen users, said on Friday the process had been rushed and risked putting children into greater danger.
"We're disappointed the Australian government has ignored the advice of the many mental health, online safety, and youth advocacy experts who have strongly opposed the ban," the spokesperson said.
Albanese said on Friday passing the bill before the age verification trial has been completed was the correct approach.
"We've got your back is our message to Australian parents," Albanese said.
"We don't argue that its implementation will be perfect, just like the alcohol ban for under 18s doesn't mean that someone under 18 never has access, but we know that it's the right thing to do."
The ban could strain Australia's relationship with key ally the United States, where X owner Elon Musk, a central figure in the administration of president-elect Donald Trump, said in a post this month it seemed a "backdoor way to control access to the Internet by all Australians".
It also builds on an existing mood of antagonism between Australia and mostly US-domiciled tech giants. Australia was the first country to make social media platforms pay media outlets royalties for sharing their content and now plans to threaten them with fines for failing to stamp out scams.
Science & Technology
South Korea authorities launch probe after three die in Hyundai car test
The Ulsan plant is Hyundai’s biggest manufacturing facility, with its own port and an annual production capacity of 1.4 million vehicles
South Korean authorities launched an investigation on Tuesday after three people died during a car test at a Hyundai Motor plant in the city of Ulsan, police told Reuters.
The two Hyundai researchers and one Hyundai contractor were found unconscious in a car at around 3:00 p.m. while they were testing it in a "chamber," according to Hyundai's labour union.
South Korean media reports said the three had suffocated.
A police officer in Ulsan said the police and the labour ministry were investigating the incident, including its cause.
A fire department official told Reuters that it first received a report at 3:17 pm that the accident happened at Hyundai's No.4 factory.
"Hyundai Motor Company is deeply saddened by the incident that occurred at our plant in Ulsan, South Korea," Hyundai said in a statement, saying it would "cooperate fully with all relevant authorities to determine the cause of this incident."
The Ulsan plant is Hyundai's biggest manufacturing facility, with its own port and an annual production capacity of 1.4 million vehicles, including exports of 1.1 million units.
In November last year, Hyundai Motor broke ground on a 2 trillion won ($1.44 billion) plant in Ulsan dedicated to making electric vehicles in South Korea, as the automaker accelerated a shift away from petrol-powered cars.
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