Day: October 20, 2023

Astronomers have detected an intense flash of radio waves coming from what looks like a merger of galaxies dating to about 8 billion years ago — the oldest-known instance of a phenomenon called a fast radio burst that continues to defy explanation. 

This burst in less than a millisecond unleashed the amount of energy our sun emits in three decades, researchers said. It was detected using the Australian SKA Pathfinder, a radio telescope in the state of Western Australia. Its location was pinpointed by the European Southern Observatory’s Very Large Telescope in Chile, one of the most powerful optical telescopes. 

A fast radio burst, or FRB, is a pulse of radio-frequency electromagnetic radiation. It lasts a small fraction of a second but outshines most other sources of radio waves in the universe. Radio waves have the longest wavelengths in the electromagnetic spectrum. 

“The radio waves in FRBs are similar to those used in microwave ovens. The amount of energy in this FRB is the equivalent to microwaving a bowl of popcorn twice the size of the sun,” said astronomer Ryan Shannon of Swinburne University of Technology in Australia, co-leader of the study published this week in the journal Science. 

Until now, the oldest known such burst dated to 5 billion years ago, making this one 3 billion years older. The universe is about 13.8 billion years old. For comparison, Earth is about 4.5 billion years old. In seeing objects and events from long ago, astronomers peer across vast cosmic distances, making this burst also the farthest of any FRB ever detected. 

“We now know that fast radio bursts have been around for more than half the age of the universe,” said astronomer and study co-leader Stuart Ryder of Macquarie University in Australia. 

Fast radio bursts were discovered in 2007. 

“The most likely source is a hypermagnetized neutron star, called a magnetar. These stars are stellar corpses the mass of the sun but only the size of a small city. They are some of the most extreme objects in the universe, which you would need to produce such extreme bursts,” Shannon said. 

“There are more energetic events in the universe, associated with stellar explosions or a black hole shredding a star apart. But FRBs are unique in that they produce all their energy in radio waves, with nothing seen in other bands — optical light or X-rays, for example — and that the signals are so short,” Shannon added. 

They also are more common, Shannon added, with upward of 100,000 thought to occur somewhere in the universe daily. Far fewer have been detected, Shannon said, and only around 50 — including this one — have been traced back to the galaxy where they originated. 

“Galaxies in the distant universe look different than those nearby — they don’t have nice spiral arms — so it wasn’t clear if what we were seeing was one galaxy with a few clumps, or a few smaller galaxies. It is likely that the source is a few galaxies, possibly merging,” Shannon said. 

The researchers said that studying these bursts also can help to detect and measure the immense amount of matter believed to populate the expanses of space between galaxies. As these radio waves zip though the cosmos, they can flag the presence of this intergalactic plasma — gas so hot that some or all its atoms are split into the subatomic particles electrons and ions. 

“Most of the normal matter in the universe — this is the regular matter that makes up stars, planets, humans — is thought to reside in a diffuse cosmic web of gas between galaxies,” Shannon said. “People have been searching for this matter for decades using other techniques. Because it is so diffuse, it is nearly invisible in any other way, so [it] was considered ‘missing.'”
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Russia’s efforts to discredit and undermine democratic elections appears to be expanding rapidly, according to newly declassified intelligence, spurred on by what the Kremlin sees as its success in disrupting the past two U.S. presidential elections.

The U.S. intelligence findings, shared in a diplomatic cable sent to more than 100 countries and obtained by VOA, are based on a review of Russian information operations between January 2020 and December 2022 that found Moscow “engaged in a concerted effort … to undermine public confidence in at least 11 elections across nine democracies.”

The review also found what the cable describes as “a less pronounced level of Russian messaging and social media activity” that targeted another 17 democracies.

“These figures represent a snapshot of Russian activities,” the cable warned. “Russia likely has sought to undermine confidence in democratic elections in additional cases that have gone undetected.

“Our information indicates that senior Russian government officials, including in the Kremlin, see value in this type of influence operation and perceive it to be effective,” the cable added.

VOA reached out to the Russian Embassy for comment on the cable warnings but so far has not received a response.

Russia has routinely denied allegations it interferes in foreign elections. However, last November, Wagner chief Yevgeny Prigozhin appeared to admit culpability for interfering in U.S. elections in a social media post.

“Gentlemen, we interfered, we interfere and we will interfere,” Prigozhin said.

U.S. officials assess that, in addition to Russia’s efforts to sow doubt surrounding the 2016 and 2020 elections in the United States, Russian campaigns have targeted countries in Asia, Europe, the Middle East and South America.

The goal, they say, is specifically to erode public confidence in election results and to paint the newly elected governments as illegitimate — using internet trolls, social media influencers, proxy websites linked to Russian intelligence and even Russian state-run media channels like RT and Sputnik.

And even though Russia’s resources have been strained due to its invasion of Ukraine, Moscow election interference efforts do not seem to be slowing down.

It is “a fairly low cost, low barrier to entry operation,” said a senior U.S. intelligence official, who spoke on the condition of anonymity in order to discuss the intelligence assessment.

“In many cases they’re amplifying existing domestic narratives that kind of question the integrity of elections,” the official said. “This is a very efficient use of resources. All they’re doing is magnifying claims that it’s unfair or it didn’t work or it’s chaotic.”

U.S. officials said they have started giving more detailed, confidential briefings to select countries that are being targeted by Russia. Some of the countries, they said, have likewise promised to share intelligence gathered from their own investigations.

Additionally, the cable makes a series of recommendations to counter the threat from the Russian disinformation campaigns, including for countries to expose, sanction and even expel any Russian officials involved in spreading misinformation or disinformation.

The cable also encourages democratic countries to engage in information campaigns to share factual information about their elections and to turn to independent election observers to assess and affirm the integrity of any elections.
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The Philippine defense chief has ordered all defense personnel and the 163,000-member military to refrain from using digital applications that harness artificial intelligence to generate personal portraits, saying they could pose security risks.

Defense Secretary Gilberto Teodoro Jr. issued the order in a Saturday memorandum, as Philippine forces have been working to weaken decades-old communist and Muslim insurgencies and defend territorial interests in the disputed South China Sea.

The Department of National Defense on Friday confirmed the authenticity of the memo, which has been circulating online in recent days, but did not provide other details, including what prompted Teodoro to issue the prohibition.

Teodoro specifically warned against the use of a digital app that requires users to submit at least 10 pictures of themselves and then harnesses AI to create “a digital person that mimics how a real individual speaks and moves.” Such apps pose “significant privacy and security risks,” he said.

“This seemingly harmless and amusing AI-powered application can be maliciously used to create fake profiles that can lead to identity theft, social engineering, phishing attacks and other malicious activities,” Teodoro said. “There has already been a report of such a case.”

Teodoro ordered all defense and military personnel “to refrain from using AI photo generator applications and practice vigilance in sharing information online” and said their actions should adhere to the Philippines Defense Department’s values and policies.
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With warmer oceans serving as fuel, Atlantic hurricanes are now more than twice as likely as before to rapidly intensify from wimpy minor hurricanes to powerful and catastrophic, a study said Thursday.

Last month Hurricane Lee went from barely a hurricane at 129 kph to the most powerful Category 5 hurricane with 249 kph winds in 24 hours. In 2017, before it devastated Puerto Rico, Hurricane Maria went from a Category 1 storm with 145 kph to a top-of-the-chart whopper with 257 kph winds in just 15 hours.

The study looked at 830 Atlantic tropical cyclones since 1971. It found that in the last 20 years, 8.1% of the time storms powered from a Category 1 minor storm to a major hurricane in just 24 hours. That happened only 3.2% of the time from 1971-90, according to a study in the journal Scientific Reports. Category 1 hurricanes top out at 153 kph and a hurricane has to have at least 178 kph winds to become major.

Those are the most extreme cases, but the fact that the rate of such turbocharging has more than doubled is disturbing, said study author Andra Garner, a climate scientist at Rowan University in New Jersey.

When storms rapidly intensify, especially as they near land, it makes it difficult for people in the storm’s path to decide on what they should do — evacuate or hunker down. It also makes it harder for meteorologists to predict how bad it will be and for emergency managers to prepare, Garner and other scientists said.

“We know that our strongest, most damaging storms very often do intensify very quickly at some point in their lifetimes,” Garner said, highlighting 2017’s Maria, which some researchers said killed nearly 3,000 people directly and indirectly. “We’re talking about something that’s hard to predict that certainly can lead to a more destructive storm.”

And this “has become more common in the last 50 years,” Garner said. “This has all happened over a time period when we’ve seen ocean waters get warmer.”

“We’ve had 90% of the excess warming that humans have caused to the planet going into our oceans,” Garner said.

Oceans this year have been setting heat records monthly since April with scientists warning of off-the-charts temperatures.

Garner found the rapid intensification of hurricanes was primarily along the East Coast’s Atlantic seaboard, more so than the Gulf of Mexico.

It’s not just the cases of extreme rapid intensification. Garner looked at all storms over different time periods and found that in general they’re intensifying faster than they used to.

There have been more Atlantic storms in the last few decades than in the 1970s and 1980s – scientists have several theories for why, from changes in air pollution to natural cycles – but Garner said by looking at percentages she took out the storm frequency factor.

Previous studies had found an increase in rapid intensification. Garner’s study was statistically meticulous in confirming what scientists had figured, said Karthik Balaguru, a Pacific Northwest National Lab climate scientist who last year had a paper demonstrating how storms near the Atlantic coast are intensifying faster before landfall than they did in the 1970s and 1980s.

The National Hurricane Center considers a storm to rapidly intensify if it increases wind speed by 46 kph in 24 hours.

In 2020, a record year for hurricanes and the last year of Garner’s study, six storms rapidly intensified that much. Hannah, Laura, Sally, Teddy, Gamma and Delta. Since then, there have been several rapid intensifying and deadly storms, including 2021’s Ida, 2022’s Ian and 2023’s Idalia.

“If we don’t work to lower our (carbon) emissions, then that’s a trend that we likely could expect to see continue to happen in the future” and even get worse, Garner said.
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After the Hamas attack on Israel, the Israeli Embassy in Beijing began posting on China’s social media platform Weibo. The online effort to gain popular support appears to be backfiring as comments revile the Jewish state, applaud Hamas and praise Adolf Hitler.

The embassy’s account, which has 24 million followers, shows almost 100 posts since the Oct. 7 attack. Some are disturbing, such as an image of a baby’s corpse burnt in the attack. Others suggest Israeli resilience, such as the story of one person who was wounded at the Nova Festival but rescued several other music fans after the attack.

The comment areas have been flooded with hate speech such as “Heroic Hamas, good job!” and “Hitler was wise” referring to the German leader who orchestrated the deaths of 6 million Jews before and during World War II. Many people changed their Weibo avatars to the Israeli flag with a Nazi swastika in the middle.

Occasionally, someone expresses support for Israel and accuses Hamas of being a terrorist group. This triggers strong reactions from other netizens, such as “Only dead Israelis are good Israelis” and “the United States supports Israel, and the friend of the enemy is the enemy.”

Similar commentary has flooded sites elsewhere on China’s heavily censored internet.

VOA Mandarin could not determine how many of the Weibo accounts posting to the Israeli Embassy account belong to people who work for the Chinese government.

The Israeli Embassy in China did not respond to interview requests from VOA Mandarin.

Eric Liu, a former Weibo moderator who is now editor of China Digital Times, told VOA Mandarin the Israeli Embassy “has received more comments recently, which are very straightforwardly hateful, with antisemitic content. They probably have taken the initiative to contain it.”

Liu believes that because the antisemitic remarks remain online, that shows the Chinese government is comfortable with them. China has long backed the Palestinian cause but more recently it has also boosted ties with Israel as it seeks a larger role in trade, technology and diplomacy.

“It’s more of a voice influenced by public opinion,” he said. “Relatively speaking, it is an extreme voice. Moderate voices cannot be heard. Most of the participants are habitual offenders who hate others. But they are also spontaneous, or rather, they are spontaneous under the guidance” of the government censors.

Gu Guoping, a retired Shanghai teacher and human rights citizen-journalist, told VOA Mandarin, “I don’t go to Weibo, WeChat, or QQ. These are all anti-human brainwashing platforms controlled by the Chinese Communist Party. Due to the CCP’s long-term brainwashing and indoctrination of ordinary people, as well as internet censorship, many Weibo users … [confuse] right and wrong.”

“They don’t know Israel at all. The Israeli nation is an amazing, great, humane and civilized nation,” said Gu, who emphasized that Hamas killed innocent people in Israel first, and Israel’s counterattack was legitimate self-defense.

Liu said that Weibo moderators usually must delete hateful comments toward foreign embassies in China. However, they may receive instructions from the Cyberspace Administration of China and the State Council Information Office for major incidents, and different standards may be applied.

VOA Mandarin contacted the Chinese Embassy in Washington, Cyberspace Administration of China and the State Council Information Office for comment but did not receive a reply.

“The government’s opinion has been very, very clear, which is why the online public opinion has such an obvious tendency,” he said. “It must be the all-round propaganda machine that led the public opinion to be like this.”

While calling for a cease-fire in the Israel-Gaza conflict, Chinese officials have refused to condemn Hamas by name. Some observers say Beijing is exploiting the Israel-Hamas war to diminish U.S. influence.

On Saturday, China’s Foreign Minister Wang Yi condemned Israel for going “beyond the scope of self-defense” and called for it to “cease its collective punishment of the people of Gaza.”

When the Iranian Embassy in China posted comments by the Iranian president accusing the United States and Israel of causing the deadly explosion at the Ahli Arab Hospital, Chinese netizens posted their support.

U.S. President Joe Biden said during his visit to Tel Aviv on October 18 that the “intel” provided by his team regarding the hospital attack exonerated Israel. Israel said the militant group Islamic Jihad caused the blast that killed at least 100 people. The militant group that often works with Hamas has denied responsibility. Palestinian officials and several Arab leaders accuse Israel of hitting the hospital amid its ongoing airstrikes in Gaza.

The Weibo accounts of other foreign embassies and diplomats that have posted support for Israel have also been targeted by Chinese netizens. When the Swiss ambassador to China, Jürg Burri, posted on Oct. 13, “I send my deepest condolences to the victims and their families in the terrorist attacks in Gaza,” he was criticized for “pseudo-neutrality.”

“I don’t even want to wear a Swiss watch anymore! So angry,” said one netizen.

Liu believes the netizens’ support for Gaza will change.

“It’s not like that they stand with Palestine,” he said. “Maybe they will hate Palestine tomorrow because they believe in Islam. [The posters] are talking in general terms and do not care about the life and death of Palestine. Hatred of Israelis and Jews is the core.”
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