Month: February 2024

Enlarge / Rows 25 and 26 in the Boeing plane that lost a door plug during flight. (credit: NTSB)

Four important bolts were missing from a Boeing 737 Max 9 that lost a passenger door plug during flight, the National Transportation Safety Board concluded in its investigation.

The NTSB's preliminary report issued today is consistent with earlier news reports stating that investigators believed the bolts were missing when the plane left Boeing's factory. The plane used by Alaska Airlines was forced to make an emergency landing on January 5 when the door plug—which is used instead of an emergency exit door—blew off the aircraft in mid-flight.

An absence of markings around the holes where bolts should have been installed was a key piece of evidence cited in the NTSB report:

Enlarge / Grasshoppers, beware! Robopteryx is here to flush you from your hiding place. (credit: Jinseok Park, Piotr Jablonski et al., 2024)

Scientists in South Korea built a robotic dinosaur and used it to startle grasshoppers to learn more about why dinosaurs evolved feathers, according to a recent paper published in the journal Scientific Reports. The results suggest that certain dinosaurs may have employed a hunting strategy in which they flapped their proto-wings to flush out prey, and this behavior may have led to the evolution of larger and stiffer feathers.

As reported previously, feathers are the defining feature of birds, but that wasn't always the case. For millions of years, various species of dinosaurs sported feathers, some of which have left behind fossilized impressions. For the most part, the feathers we've found have been attached to smaller dinosaurs, many of them along the lineage that gave rise to birds—although in 2012, scientists discovered three nearly complete skeletons of a "gigantic" feathered dinosaur species, Yutyrannus huali, related to the ancestors of Tyrannosaurus Rex.

Various types of dino-feathers have been found in the fossil record over the last 30 years, such as so-called pennaceous feathers (present in most modern birds). These were found on distal forelimbs of certain species like Caudipteryx, serving as proto-wings that were too small to use for flight, as well as around the tip of the tail as plumage. Paleontologists remain unsure of the function of pennaceous feathers—what use could there be for half a wing? A broad range of hypotheses have been proposed: foraging or hunting, pouncing or immobilizing prey, brooding, gliding, or wing-assisted incline running, among others.

Enlarge (credit: Darrell Gulin | The Image Bank)

After more than a year as an exclusive invite-only social media platform, Bluesky is now open to the public, so anyone can join without needing a once-coveted invite code.

In a blog, Bluesky said that requiring invite codes helped Bluesky "manage growth" while building features that allow users to control what content they see on the social platform.

When Bluesky debuted, many viewed it as a potential Twitter killer, but limited access to Bluesky may have weakened momentum. As of January 2024, Bluesky has more than 3 million users. That's significantly less than X (formerly Twitter), which estimates suggest currently boasts more than 400 million global users.

Enlarge (credit: Darrell Gulin | The Image Bank)

After more than a year as an exclusive invite-only social media platform, Bluesky is now open to the public, so anyone can join without needing a once-coveted invite code.

In a blog, Bluesky said that requiring invite codes helped Bluesky "manage growth" while building features that allow users to control what content they see on the social platform.

When Bluesky debuted, many viewed it as a potential Twitter killer, but limited access to Bluesky may have weakened momentum. As of January 2024, Bluesky has more than 3 million users. That's significantly less than X (formerly Twitter), which estimates suggest currently boasts more than 400 million global users.

Enlarge / An annotated image showing the various parts and instruments of NASA's Voyager spacecraft design. (credit: NASA/Hulton Archive/Getty Images)

Voyager 1 is still alive out there, barreling into the cosmos more than 15 billion miles away. However, a computer problem has kept the mission's loyal support team in Southern California from knowing much more about the status of one of NASA's longest-lived spacecraft.

The computer glitch cropped up on November 14, and it affected Voyager 1's ability to send back telemetry data, such as measurements from the spacecraft's science instruments or basic engineering information about how the probe was doing. So, there's no insight into key parameters regarding the craft's propulsion, power, or control systems.

"It would be the biggest miracle if we get it back. We certainly haven't given up," said Suzanne Dodd, Voyager project manager at NASA's Jet Propulsion Laboratory, in an interview with Ars. "There are other other things we can try. But this is, by far, the most serious since I’ve been project manager."

Enlarge / An annotated image showing the various parts and instruments of NASA's Voyager spacecraft design. (credit: NASA/Hulton Archive/Getty Images)

Voyager 1 is still alive out there, barreling into the cosmos more than 15 billion miles away. However, a computer problem has kept the mission's loyal support team in Southern California from knowing much more about the status of one of NASA's longest-lived spacecraft.

The computer glitch cropped up on November 14, and it affected Voyager 1's ability to send back telemetry data, such as measurements from the spacecraft's science instruments or basic engineering information about how the probe was doing. So, there's no insight into key parameters regarding the craft's propulsion, power, or control systems.

"It would be the biggest miracle if we get it back. We certainly haven't given up," said Suzanne Dodd, Voyager project manager at NASA's Jet Propulsion Laboratory, in an interview with Ars. "There are other other things we can try. But this is, by far, the most serious since I’ve been project manager."

Enlarge (credit: Getty Images | CalypsoArt)

AT&T's application to end its landline phone obligations in California is drawing protest from residents as state officials consider whether to let AT&T off the hook.

AT&T filed an application to end its Carrier of Last Resort (COLR) obligation in March 2023. The first of several public hearings on the application is being held today by the California Public Utilities Commission (CPUC), which is considering AT&T's request. An evidentiary hearing has been scheduled for April, and a proposed decision is expected in September.

AT&T has said it won't cut off phone service immediately, but ending the COLR obligation would make it easier for AT&T to drop its phone lines later on. AT&T's application said it would provide basic phone service in all areas for at least six months and indefinitely in areas without any alternative voice service.

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  Boston Dynamics' Atlas research robot. [credit: Boston Dynamics ]

The world's most advanced humanoid robot, Boston Dynamics' Atlas, is back, and it's moving some medium-weight car parts. While the robot has mastered a lot of bi-pedal tricks like walking, running, jumping, and even backflips, it's still in the early days of picking stuff up. When we last saw the robot, it had sprouted a set of rudimentary hand clamps and was using those to carry heavy objects like a toolbox, barbells, and a plank of wood. The new focus seems to be on "kinetically challenging" work—these things are heavy enough to mess with the robot's balance, so picking them up, carrying them, and putting them down requires all sorts of additional calculations and planning so the robot doesn't fall over.

In the latest video, we're on to what looks like "phase 2" of picking stuff up—being more precise about it. The old clamp hands had a single pivot at the palm and seemed to just apply the maximum grip strength to anything the robot picked up. The most delicate thing Atlas picked up in the last video was a wooden plank, and it was absolutely destroying the wood. Atlas' new hands look a lot more gentle than The Clamps, with each sporting a set of three fingers with two joints. All the fingers share one big pivot point at the palm of the hand, and there's a knuckle joint halfway up the finger. The fingers are all very long and have 360° of motion, so they can flex in both directions, which is probably effective but very creepy. Put two fingers on one side of an item and the "thumb" on the other, and Atlas can wrap its hands around objects instead of just crushing them.

Atlas is picking up a set of car struts—an object with extremely complicated topography that weighs around 30 pounds—so there's a lot to calculate. Atlas does a heavy two-handed lift of a strut from a vertical position on a pallet, walks the strut over to a shelf, and carefully slides it into place. This is all in Boston Dynamics' lab, but it's close to repetitive factory or shipping work. Everything here seems designed to give the robot a manipulation challenge. The complicated shape of the strut means there are a million ways you could grip it incorrectly. The strut box has tall metal poles around it, so the robot needs to not bang the strut into the obstacle. The shelf is a tight fit, so the strut has to be placed on the edge of the shelf and slid into place, all while making sure the strut's many protrusions won't crash into the shelf.

Enlarge (credit: Malte Mueller | fStop)

The Federal Trade Commission has succeeded in keeping alive its first federal court case against a geolocation data broker that's allegedly unfairly selling large quantities of data in violation of the FTC Act.

On Saturday, US District Judge Lynn Winmill denied Kochava's motion to dismiss an amended FTC complaint, which he said plausibly argued that "Kochava’s data sales invade consumers’ privacy and expose them to risks of secondary harms by third parties."

Winmill's ruling reversed a dismissal of the FTC's initial complaint, which the court previously said failed to adequately allege that Kochava's data sales cause or are likely to cause a "substantial" injury to consumers.