Lithium may be the key component in most modern batteries, but it doesn't make up the bulk of the material used in them. Instead, much of the material is in the electrodes, where the lithium gets stored when the battery isn't charging or discharging. So one way to make lighter and more compact lithium-ion batteries is to find electrode materials that can store more lithium. That's one of the reasons that recent generations of batteries are starting to incorporate silicon into the electrode materials.

There are materials that can store even more lithium than silicon; a notable example is sulfur. But sulfur has a tendency to react with itself, producing ions that can float off into the electrolyte. Plus, like any electrode material, it tends to expand in proportion to the amount of lithium that gets stored, which can create physical strains on the battery's structure. So while it has been easy to make lithium-sulfur batteries, their performance has tended to degrade rapidly.

But this week, researchers described a lithium-sulfur battery that still has over 80 percent of its original capacity after 25,000 charge/discharge cycles. All it took was a solid electrolyte that was more reactive than the sulfur itself.

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TikTok has lost its Supreme Court appeal and will likely shut down on January 19, a day ahead of Donald Trump's inauguration, unless the app can be sold before the deadline, which TikTok has said is impossible.

During the trial last Friday, TikTok lawyer Noel Francisco warned SCOTUS that upholding the Biden administration's divest-or-sell law would likely cause TikTok to “go dark—essentially the platform shuts down" and "essentially... stop operating." On Wednesday, TikTok reportedly began preparing to shut down the app for all US users, anticipating the loss.

But TikTok's claims that the divest-or-sell law violated Americans' free speech rights did not supersede the government's compelling national security interest in blocking a foreign adversary like China from potentially using the app to spy on or influence Americans, SCOTUS ruled.

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Brussels has ordered Elon Musk to fully disclose recent changes made to recommendations on X, stepping up an investigation into the role of the social media platform in European politics.

The expanded probe by the European Commission, announced on Friday, requires X to hand over internal documents regarding its recommendation algorithm. The Commission also issued a “retention order” for all relevant documents relating to how the algorithm could be amended in future.

In addition, the EU regulator requested access to information on how the social media network moderates and amplifies content.

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Heavy drinking is clearly bad for your health. But it's long been questioned whether moderate drinking is also risky—and, if so, how risky, exactly.

Health researchers have consistently found links between alcohol consumption and several types of cancers (namely mouth, throat, colon, rectal, liver, and breast), as well as liver diseases, injuries, and traffic accidents. But nailing down the health risks from the lower levels of drinking has been tricky. For one, much of the data on moderate drinking are from observational studies in different countries, cultures, and populations. They cannot determine if alcohol is the direct cause of any given association, and they may be swayed by other lifestyle factors. The resulting data can be noisy and inconsistent.

Moreover, many studies rely on people to self-report whether they drink and, if so, how much, which is problematic because people may not accurately assess and/or report how much they actually drink. A related problem is that studies in the past often compared drinkers to people who said they didn't drink. But, the trouble is, non-drinking groups are often some mix of people who are lifelong abstainers and people who used to drink but quit for some reason—maybe because of health effects. This latter group has the potential to have lingering health effects from their drinking days, which could skew any comparisons looking for health differences.

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Welcome to Edition 7.27 of the Rocket Report! Thursday was an eventful day in super heavy lift launch, with Blue Origin's New Glenn rocket having a highly successful debut launch before dawn in Florida, at Cape Canaveral Space Force Station. Then, on Thursday afternoon, an upgraded Starship took flight from South Texas. The first stage performed well, but the Starship upper stage experienced a rapid unscheduled disassembly during its ascent. Ars will, of course, have full and ongoing coverage.

As always, we welcome reader submissions , and if you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets, as well as a quick look ahead at the next three launches on the calendar.

RFA receives launch license . The UK Civil Aviation Authority has issued Rocket Factory Augsburg a vertical launch license to conduct the inaugural flight of its RFA ONE rocket from SaxaVord Spaceport in Scotland, European Spaceflight reports . The license is for the launch of the company's RFA One rocket, which has an advertised payload of 1.3 metric tons to low-Earth orbit. RFA said it intends to complete the launch sometime this year.

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SpaceX launched an upgraded version of its massive Starship rocket from South Texas on Thursday, but the flight ended less than nine minutes later after engineers lost contact with the spacecraft.

For a few moments, SpaceX officials discussing the launch on the company's live webcast were unsure of the outcome of the test flight. However, within minutes, residents and tourists in the Turks and Caicos Islands, Haiti, the Dominican Republic, and Puerto Rico shared videos showing a shower of debris falling through the atmosphere along Starship's expected flight corridor.

The videos confirmed Starship — the rocket's upper stage — broke apart in space, or experienced a "rapid unscheduled disassembly" in SpaceX-speak. This happened well short of the company's plan of sending the spacecraft halfway around the world and splashing down in the Indian Ocean after more than an hour of flight.

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Cell phones are magnets for our attention, but you can, of course, face significant legal jeopardy for giving them that attention. Just ask the "safety driver" of an Uber self-driving vehicle, which hit and killed a pedestrian in Arizona in 2018. According to authorities, the driver was watching The Voice on Hulu just before the crash—and was then charged with negligent homicide.

These kinds of cases are always tragic because they feel so easily avoidable, but they also happen with enough regularity that it's easy to tune them out. According to the National Highway Traffic Safety Administration, 3,308 people were killed by distracted drivers in 2022 alone —and "texting is the most alarming distraction."

That's why states continue to crack down on cell phone use while driving. A Colorado law that went into effect on January 1, for instance, bans a driver from using any mobile electronic device unless it is hands-free. Thirty US states now have such bans in place.

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Taking action in the final days of the Biden administration, the Federal Communications Commission dismissed three complaints and a petition filed against broadcast television stations. FCC Chairwoman Jessica Rosenworcel said the action is important because "the incoming President has called on the Federal Communications Commission to revoke licenses for broadcast television stations because he disagrees with their content and coverage."

"Today, I have directed the FCC to take a stand on behalf of the First Amendment," she said. "We draw a bright line at a moment when clarity about government interference with the free press is needed more than ever. The action we take makes clear two things. First, the FCC should not be the president's speech police. Second, the FCC should not be journalism's censor-in-chief."

President-elect Donald Trump's chosen replacement for Rosenworcel, Commissioner Brendan Carr, wants the FCC to punish news broadcasters that he perceives as being unfair to Trump or Republicans in general. Backing Trump's various complaints about news stations, Carr has threatened to revoke licenses by wielding the FCC's authority to ensure that broadcasters using public airwaves operate in the public interest.

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Google has added AI features to its regular Workspace accounts for business while slightly raising the baseline prices of Workspace plans.

Previously, AI tools in the Gemini Business plan were a $20 per seat add-on to existing Workspace accounts, which had a base cost of $12 per seat without. Now, the AI tools are included for all Workspace users, but the per-seat base price is increasing from $12 to $14.

That means that those who were already paying extra for Gemini are going to pay less than half of what they were—effectively $14 per seat instead of $32. But those who never used or wanted Gemini or any other newer features under the AI umbrella from Workspace are going to pay a little bit more than before.

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