Month: August 2024

Enlarge / The crew of Fram2 from left to right: Eric Philips, Jannicke Mikkelsen, Chun Wang, and Rabea Rogge. (credit: SpaceX)

SpaceX will fly the first-ever human spaceflight over the Earth’s poles, possibly before the end of this year, the company announced Monday. The private Crew Dragon mission will be led by a Chinese-born cryptocurrency entrepreneur named Chun Wang, and he will be joined by a polar explorer, a roboticist, and a filmmaker whom he has befriended in recent years.

The "Fram2" mission, named after the Norwegian research ship Fram, will launch into a polar corridor from SpaceX's launch facilities in Florida and fly directly over the north and south poles. The three-to-five day mission is being timed to fly over Antarctica near the summer solstice in the Southern Hemisphere, to afford maximum lighting.

The four-person crew will fly, fittingly, aboard Crew Dragon Endurance, which is named after Ernest Shackleton's famous ship that was trapped in the Antarctic ice and eventually sunk there about a century ago. The spacecraft will be fitted with a cupola for both photography and filming.

Enlarge / MDMA (credit: Getty | PYMCA/Avalon)

A scientific journal has retracted three studies underpinning the clinical development of MDMA—aka ecstasy—as a psychedelic treatment for post-traumatic stress disorder. The move came just a day after news broke that the Food and Drug Administration rejected the treatment, despite positive results reported from two Phase III clinical trials.

On Friday, the company developing the therapy, Lykos Therapeutics, announced that it had received a rejection letter from the FDA. Lykos said the letter echoed the numerous concerns raised previously by the agency and its expert advisory committee, which, in June, voted overwhelmingly against approving the therapy. The FDA and its advisors identified flaws in the design of the clinical trials, missing data, and a variety of biases in people involved with the trials, including an alleged cult-like support of psychedelics. Lykos is a commercial spinoff of the psychedelic advocacy nonprofit Multidisciplinary Association for Psychedelic Studies (MAPS).

FDA advisors also noted the public allegations of a sexual assault of a trial participant during a Phase II trial by an unlicensed therapist providing the MDMA-assisted psychotherapy.

Enlarge / Great white sharks can reduce drag at different swimming speeds thanks to high and low ridged dentricles in its skin. (credit: Terry Goss/CC BY 2.5)

The great white shark (Carcharodon carcharias) is a swift and mighty hunter, capable of reaching speeds as high as 6.7 m/s when breaching, although it prefers to swim at slower speeds for migration and while waiting for prey. A team of Japanese researchers has studied the structure of the great white's skin to learn more about how these creatures adapt so well to a wide range of speeds. Their findings could lead to more efficient aircraft and boats with greatly reduced drag, according to a recent paper published in the Journal of the Royal Society Interface.

As previously reported, anyone who has touched a shark knows the skin feels smooth if you stroke from nose to tail. Reverse the direction, however, and it feels like sandpaper. That's because of tiny translucent scales, roughly 0.2 millimeters in size, called "denticles" (because they strongly resemble teeth) all over the shark's body, especially concentrated in the animal's flanks and fins. It's like a suit of armor for sharks and it also serves as a means of reducing drag in the water while swimming.

Pressure drag is the result of flow separation around an object, like an aircraft or the body of a mako shark as it moves through water; the magnitude of pressure drag is determined by the shape of the object. It's what happens when the fluid flow separates from the surface of an object, forming eddies and vortices that impede the object's movement. Since the shark's body is constantly undulating as it swims, it needs something to help keep the flow attached around that body to reduce that drag. Denticles serve that purpose.

Enlarge (credit: Gary Hershorn / Contributor | Corbis News)

Google announced Monday that it's shutting down all AdSense accounts in Russia due to "ongoing developments in Russia."

This effectively ends Russian content creators' ability to monetize their posts, including YouTube videos. The change impacts accounts monetizing content through AdSense, AdMob, and Ad Manager, the support page said.

While Google has declined requests to provide details on what prompted the change, it's the latest escalation of Google's ongoing battle with Russian officials working to control the narrative on Russia's war with Ukraine.

Enlarge / Independent presidential candidate Robert F. Kennedy Jr. (credit: Kevin Dietsch / Staff | Getty Images News)

The Children's Health Defense (CHD), an anti-vaccine group founded by Robert F. Kennedy Jr, has once again failed to convince a court that Meta acted as a state agent when censoring the group's posts and ads on Facebook and Instagram.

In his opinion affirming a lower court's dismissal, US Ninth Circuit Court of Appeals Judge Eric Miller wrote that CHD failed to prove that Meta acted as an arm of the government in censoring posts. Concluding that Meta's right to censor views that the platforms find "distasteful" is protected by the First Amendment, Miller denied CHD's requested relief, which had included an injunction and civil monetary damages.

"Meta evidently believes that vaccines are safe and effective and that their use should be encouraged," Miller wrote. "It does not lose the right to promote those views simply because they happen to be shared by the government."

Enlarge / The Bambu Lab A1, complete with heated build platform. (credit: Bambu Lab)

A patent lawsuit filed by one of 3D printing's most established firms against a consumer-focused upstart could have a big impact on the wider 3D-printing scene.

In two complaints, (1, 2, PDF) filed in the Eastern District of Texas, Marshall Division, against six entities related to Bambu Lab, Stratasys alleges that Bambu Lab infringed upon 10 patents that it owns, some through subsidiaries like Makerbot (acquired in 2013). Among the patents cited are US9421713B2, "Additive manufacturing method for printing three-dimensional parts with purge towers," and US9592660B2, "Heated build platform and system for three-dimensional printing methods."

There are not many, if any, 3D printers sold to consumers that do not have a heated bed, which prevents the first layers of a model from cooling during printing and potentially shrinking and warping the model. "Purge towers" (or "prime towers" in Bambu's parlance) allow for multicolor printing by providing a place for the filament remaining in a nozzle to be extracted and prevent bleed-over between colors. Stratasys' infringement claims also target some fundamental technologies around force detection and fused deposition modeling (FDM) that, like purge towers, are used by other 3D-printer makers that target entry-level and intermediate 3D-printing enthusiasts.

Enlarge / No, you haven't been "AI'd." That's a real crowd. (credit: Bhavik Lathia)

Donald Trump may have coined a new term in his latest false attack on Kamala Harris' presidential campaign. In a pair of posts on Truth Social over the weekend, the former president said that Vice President Kamala Harris "A.I.'d" photos of a huge crowd that showed up to see her speak at a Detroit airport campaign rally last week.

"There was nobody at the plane, and she 'A.I.’d' it, and showed a massive 'crowd' of so-called followers, BUT THEY DIDN’T EXIST!" Trump wrote. "She’s a CHEATER. She had NOBODY waiting, and the 'crowd' looked like 10,000 people! Same thing is happening with her fake 'crowds' at her speeches."

The Harris campaign responded with its own post saying that the image is "an actual photo of a 15,000-person crowd for Harris-Walz in Michigan."