An unknown source has been sending radio blasts towards Earth since at least 1988, scientists say. The researchers do not know what object is sending the radio waves towards Earth. The nature of the waves is such that they do not conform with any models that attempt to explain it. For 35 years, the source has been sending out regular 20-minute blasts of energy that vary considerably in their brightness, researchers say. The emissions appear something like the blasts that come out of pulsars or fast radio bursts, which last for milliseconds to several seconds. But the newly discovered source sends radio signals that pulsate on a period of 21 minutes – something previously thought impossible by expected explanations. Pulsars are neutron stars that spin around quickly, throwing out radio blasts as they do. When one crosses Earth, the emissions can be picked up very briefly and brightly, like being in the path of the light from a rotating lighthouse. Scientists believe that process can only work if the magnetic field of the pulsar is strong, and it is rotating quickly enough – if not, there would not be enough energy to see the pulsar from Earth. That has led to the development of the “pulsar death line”, which suggests that sources must be spinning fast and strong enough to be detected. The newly discovered object named GPMJ1839-10, however, is way beyond that death line. If it is a pulsar, then it seems to be operating in ways that scientists thought impossible. It could also be a highly magnetised white dwarf or magnetar, an extra kind of neutron star with incredibly strong magnetic fields. But they do not tend to send out emissions of this kind, researchers believe. The signals have been detected on Earth since at least 1988, scientists found by going through old records, but they had gone unnoticed by those collecting that data. After the source was detected, researchers checked radio archives and found that the source has been repeating for at least 35 years. Yet more discoveries may be made in this way in the future, said Victoria M Kaspi, a professor of physics at McGill University who did not work on the study. “Only time will tell what else lurks in these data, and what observations across many astronomical timescales will reveal,” she wrote in an accompanying article. That might include some explanation of how unusual the newly discovered source is. By examining whether there are is a similar collection of other objects in the data, researchers might be able to understand the mechanisms behind the newly discovered emissions. The findings are reported in a new paper, ‘A long-period radio transient active for three decades’, published in the journal Nature. Read More Scientists invent self-healing solar panels with ‘miracle material’ Powerful solar flare to disrupt communications, Russians warn New technique represents major breakthrough in search for aliens, scientists say

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Cambodian Prime Minister Hun Sen, a devoted and very active user of Facebook — on which he has posted everything from photos of his grandchildren to threats against his political enemies — said Wednesday that he will no longer upload to the platform and will instead depend on the Telegram app to get his message across. Telegram is a popular messaging app that also has a blogging tool called “channels.” In Russia and some of the neighboring countries, it is actively used both by government officials and opposition activists for communicating with mass audiences. Telegram played an important role in coordinating unprecedented anti-government protests in Belarus in 2020, and currently serves as a major source of news about Russia’s war in Ukraine. The 70-year-old year Hun Sen is listed as having 14 million Facebook followers, though critics have suggested a large number are merely “ghost” accounts purchased in bulk from so-called “click farms,” an assertion the long-serving prime minister has repeatedly denied. The Facebook accounts of Joe Biden and Donald Trump by comparison boast 11 million and 34 million followers, respectively, though the United States has about 20 times the population of Cambodia. Hun Sen officially launched his Facebook page on Sept. 20, 2015, after his fierce political rival, opposition leader Sam Rainsy, effectively demonstrated how it could be used to mobilize support. Hun Sen is noted as a canny and sometimes ruthless politician, and has since then managed to drive his rival into exile and neutralize all his challengers, even though Cambodia is a nominally democratic state. Hun Sen said he is giving up Facebook for Telegram because he believes the latter is more effective for communicating. In a Telegram post on Wednesday he said it will be easier for him to get his message out when he is traveling in other countries that officially ban Facebook use. China, the top ally of his government, is also the biggest country with a Facebook ban. Hun Sen has 855,000 followers so far on Telegram, where he appears to have started posting in mid-May. It is also possible that Hun Sen’s social media loyalty switch has to do with controversy over remarks he posted earlier this year on Facebook that in theory could see him get at least temporarily banned from the platform. As the country’s top leader for 38 years, he has earned a reputation for heated rhetoric, and in January, speaking at a road construction ceremony, he decried opposition politicians who accused his ruling Cambodian People’s Paty of stealing votes. “There are only two options. One is to use legal means and the other is to use a stick,” the prime minister said. “Either you face legal action in court, or I rally (the Cambodian) People’s Party people for a demonstration and beat you up.” His remarks were spoken on Facebook Live and kept online as a video. Perhaps because of heightened consciousness about the power of social media to inflame and trigger violence in such countries as India and Myanmar, and because the remarks were made ahead of a general election in Cambodia this July, complaints about his words were lodged with Facebook’s parent company, Meta. Facebook’s moderators declined to recommend action against Hun Sen, judging that his position as a national leader made his remarks newsworthy and therefore not subject to punishment despite their provocative nature. However, the case was forwarded in March to Meta’s Oversight Board, a group of independent experts that is empowered to render an overriding judgment that could limit Hun Sen’s Facebook activities. They may issue a decision in the next few weeks. The case is being closely watched as an indicator of where Facebook will draw the line in countries with volatile political situations. Hun Sen said his Facebook account will remain online but he will no longer actively post to it. He urged people looking for news from him to check YouTube and his Instagram account as well as Telegram, and said he has ordered his office to establish a TikTok account to allow him to communicate with his country’s youth.. ___ Peck reported from Bangkok. Dasha Litvinova contributed from Tallinn, Estonia. Read More Ukraine war’s heaviest fight rages in east - follow live Charity boss speaks out over ‘traumatic’ encounter with royal aide Cambodian lawmakers approve changes to election law that disqualify candidates who don't vote Trump’s latest defence in the classified documents case: ‘Bravado’ Trump gives ‘bravado’ defence for secret papers tape as he sues E Jean Carroll – live

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