Since it was founded in March 2006, there has been only one type of post possible on Twitter: a tweet. But starting today, the 280-character post is being joined by an ephemeral South American cousin: the fleet. That’s what Twitter is calling these new, more fleeting tweets — posts that appear in a separate timeline above the main timeline for 24 hours before disappearing. From a report: In other words, yes, Twitter is finally doing Snapchat Stories, and the implementation looks nearly identical to Instagram’s version of the feature. “Twitter is for having conversations about what you care about,” Mo Aladham, a Twitter group product manager, said in a blog post. “But, some of you tell us that you’re uncomfortable to tweet because tweets are public, feel permanent, and have public counts (retweets and likes). We want to make it possible for you to have conversations in new ways with less pressure and more control, beyond tweets and direct messages. That’s why starting today in Brazil, we’re testing fleets, a new way to start conversations from your fleeting thoughts.”

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An anonymous reader shares a report: After years of avoiding social media, drug companies are growing bolder about advertising on Facebook and other social networks, according to interviews with advertising executives, marketers, health-care privacy researchers and patient advocates. That is exposing loopholes around the way data can be used to show consumers relevant ads about their personal health, even as both social networks and pharmaceutical manufacturers disavow targeting ads to people based on their medical conditions. Ads promoting prescription drugs are popping up on Facebook for depression, HIV and cancer. Spending on Facebook mobile ads alone by pharmaceutical and health-care brands reached nearly a billion dollars in 2019, nearly tripling over two years, according to Pathmatics, an advertising analytics company. Facebook offers tools to help drug companies stay compliant with rules about disclosing safety information or reporting side effects.

But seeing an ad for a drug designed to treat a person’s particular health condition in the relatively intimate setting of a social media feed — amid pictures of friends and links to news articles — can feel more intrusive than elsewhere online. The same opaque Facebook systems that help place an ad for a political campaign or a new shoe in a user’s feed also can be used by pharmaceutical companies, allowing them to target consumers who match certain characteristics or had visited a particular website in the past. The ability of drug companies to reach people likely to have specific health conditions — a far cry from a magazine or TV ad — underscores how the nation’s health privacy law, the Health Insurance Portability and Accountability Act (HIPAA), has not kept up with the times. HIPAA, which safeguards personal health records, typically does not cover drug companies or social media networks.

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Chinese social media platforms, including Tencent’s WeChat, censored keywords related to coronavirus as early as December [Editor’s note: the link may be paywalled; alternative source], potentially limiting the Chinese public’s ability to protect themselves from the virus. From a report: Beijing has strictly controlled access to information throughout the coronavirus outbreak, which has killed more than 3,000 people worldwide. Research by the University of Toronto’s Citizen Lab, one of the first reports into information control during the outbreak, say the censorship started in the early stages of the crisis. Authorities blocked a wide range of speech — including criticism of the central government — in a bid to control the narrative and manage public sentiment. Public anger over the outbreak, the biggest crisis Xi Jinping has faced since becoming president, has largely been directed towards local rather than central government officials. But critics allege that Beijing’s response severely hampered the effort to contain the outbreak. “The broad censorship of the coronavirus we found is significant because blocking general information during a health crisis can limit the public’s ability to be informed and protect themselves,” said Lotus Ruan, a researcher at Citizen Lab.

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TikTok, the hugely popular social media app, found a lot of early traction by giving users a way to create funny lip-synced versions of clips from well-known songs and then share them with friends (its predecessor in the West was even called Musically). Now at long last, TikTok’s owner, China’s ByteDance, is doubling down on the music connection with the release of its first standalone full music streaming app, starting first in India. From a report: Today, the company is launching Resso, which describes itself as a “social music streaming app”: users are encouraged to share lyrics, comments and other user-generated content with each other, alongside full-length tracks of music that they can consume and also share with others. And the music begins to auto-play as soon as you open the app. Unlike its sister app TikTok, which is free to use and is built on an ad-based model, Resso is following the freemium route that a number of other big music apps, such as Spotify, have taken. A free tier includes ads and limits streaming quality to 128 Kbps; a premium, ad-free tier boosts streaming to 256 Kbps, includes downloads and the ability to skip tracks and costs INR 99/month ($1.35/month) on Android and INR 119/month ($1.62) on iOS.

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The most promising startups using artificial intelligence are U.S.-based companies working in the fields of health care, retail and transportation, according to a study that looked at budding AI companies around the world. From a report: Of the top 100 startups in AI, 65% were based in the U.S., though some of those had dual headquarters in China or elsewhere, according to the analysis by CB Insights, a tech research group that analyzed data on close to 5,000 startups around the world. “These would be companies to watch that are doing really interesting research in AI,” said Deepashri Varadharajan, the lead analyst on the report. “Some of them might get acquired. Some might have successful product launches.” The research group considered venture capital investment, patent activity and market potential to develop its list of the companies most likely to succeed. The high percentage of U.S.-based companies reflect the country’s historical dominance in AI research, Varadharajan said.

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India’s Supreme Court on Wednesday overturned central bank’s two-year-old ban on cryptocurrency trading in the country in what many said was a “historic” verdict. From a report: The Reserve Bank of India had imposed a ban on cryptocurrency trading in April 2018 that barred banks and other financial institutions from facilitating “any service in relation to virtual currencies.” At the time, RBI said the move was necessary to curb “ring-fencing” of the country’s financial system. It had also argued that Bitcoin and other cryptocurrencies cannot be treated as currencies as they are not made of metal or exist in physical form, nor were they stamped by the government. The 2018 notice from the central bank sent a panic to several local startups and companies offering services to trade in cryptocurrency. Nearly all of them have since closed shop.

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An anonymous reader quotes a report from Bleeping Computer: SETI@home has announced that they will no longer be distributing new work to clients starting on March 31st as they have enough data and want to focus on completing their back-end analysis of the data. SETI@home is a distributed computing project where volunteers contribute their CPU resources to analyze radio data from the Arecibo radio telescope in Puerto Rico and the Green Bank Telescope in West Virginia for signs of extraterrestrial intelligence (SETI).

Run by the Berkeley SETI Research Center since 1999, SETI@home has been a popular project where people from all over the world have been donating their CPU resources to process small chunks of data, or “jobs,” for interesting radio transmissions or anomalies. This data is then sent back to the researchers for analysis. In an announcement posted yesterday, the project stated that they will no longer send data to SETI@home clients starting on March 31st, 2020 as they have reached a “point of diminishing returns” and have analyzed all the data that they need for now. Instead, they want to focus on analyzing the back-end results in order to publish a scientific paper. SETI@Home has a list of BOINC projects on their website for those interested in donating their CPU resources.

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Microsoft is bringing the original Halo campaign to Windows PCs today. The Verge reports: Halo: Combat Evolved Anniversary has been remastered with 4K support for PC, and it arrives 18 years after the game debuted as a launch title for the original Xbox. Microsoft is also including 60fps support, variable frame rates, and even native keyboard and mouse support. You’ll also be able to use the classic audio in multiplayer and customize Spartans further. Halo: Combat Evolved Anniversary is part of Microsoft’s ongoing effort to bring all of the Halo: The Master Chief Collection to PC.

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A team of researchers from Plex Corporation, Bruker Scientific LLC and Harvard University has found evidence of a protein inside of a meteorite. They have written a paper describing their findings and have uploaded it to the arXiv preprint server. Phys.Org reports: In this new effort, the researchers have discovered a protein called hemolithin inside of a meteorite that was found in Algeria back in 1990. The hemolithin protein found by the researchers was a small one, and was made up mostly of glycine, and amino acids. It also had oxygen, lithium and iron atoms at its ends — an arrangement never seen before. The team’s paper has not yet been peer reviewed, but once the findings are confirmed, their discovery will add another piece to the puzzle that surrounds the development of life on Earth. Proteins are considered to be essential building blocks for the development of living things, and finding one on a meteorite bolsters theories that suggest either life, or something very close to it, came to Earth from elsewhere in space.

Proteins are considered by chemists to be quite complex, which means a lot of things would have to happen by chance for protein formation. For hemolithin to have formed naturally in the configuration found would require glycine to form first, perhaps on the surface of grains of space dust. After that, heat by way of molecular clouds might have induced units of glycine to begin linking into polymer chains, which at some point, could evolve into fully formed proteins. The researchers note that the atom groupings on the tips of the protein form an iron oxide that has been seen in prior research to absorb photons — a means of splitting water into oxygen and hydrogen, thereby producing an energy source that would also be necessary for the development of life.

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