3D‑print skew fixed by camera calibration; Sabalenka repeats at US Open; sweeteners linked to cognitive decline; Dickson sends Somerset to Finals Day over Bears; Maher says RFK Jr. “has to go” after Senate clash

Camera and ChArUco Calibration Eliminates Skew in 3D Prints
Camera and ChArUco Calibration Eliminates Skew in 3D Prints—and yes, it also rescues your laser cutter from its tragic parallelogram phase. Instead of dialing 1-800-CLASS-ACTION, a tool-mounted endoscopic camera and a ChArUco board do the grown-up thing: measure tiny X–Y feed-rate mismatches that warp your supposed right angles. The maker’s software analyzes a printed ChArUco pattern—think chessboard with ArUco ID tags—then spits out Klipper commands to correct X–Y skew so squares stay square and parts actually fit. It builds on earlier pressure-advance work using the same camera, but now the lens is hunting geometry gremlins, not filament lag. OpenCV handles the pattern detection, a PDF board is provided, and the whole setup is refreshingly practical. Shockingly effective, modestly nerdy, and a lot cheaper than pretending your miscalibration is “art.” Now, what else can we do with ChArUco besides the occasional toolpath visualization? Suggestions welcome.
Sabalenka stays composed to defend US Open title
Sabalenka stays composed to defend US Open title as world number one Aryna Sabalenka shuts out the New York noise and sees off home hope Amanda Anisimova to retain her crown. It’s her first major of the year, a reminder that composure beats crowd energy—especially when your forehand hits like a small weather event.
Six artificial sweeteners associated with cognitive decline
Six artificial sweeteners associated with cognitive decline: an eight-year Brazilian study of 12,700 adults linked aspartame, saccharin, acesulfame-K, erythritol, sorbitol, and xylitol to faster drops in cognition and verbal fluency before age 60, with a sharper slide in younger participants with diabetes and no significant effect seen in those over 60. Researchers stress it’s observational—with self-reported diets and plenty of potential confounders—and point to animal data hinting at brain inflammation and gut–brain disruption, though at higher doses than humans typically consume. The International Sweeteners Association replied with the classic “association isn’t causation,” which is true and also the sort of reassurance that pairs well with a raised eyebrow. Regulators still say FDA-authorized sweeteners are safe as used, while Robert F. Kennedy Jr. has turned his fire on sugar itself, calling it “poison” and suggesting the ideal intake is zero—bold advice for a species that considers frosting a food group. Bottom line: diet sweeteners may not be brain food, and the science is still sorting out how much is risk, how much is lifestyle, and how much is industry spin.
Dickson leads Somerset to Finals Day, denying Bears
Dickson leads Somerset to Finals Day, denying Bears, as Sean Dickson drilled two sixes and a four in the final over to snatch a T20 Blast win and seal qualification—Somerset through, Bears sent packing.
Sabalenka wins back-to-back U.S. Open women’s singles titles
Sabalenka wins back-to-back U.S. Open women’s singles titles, defeating U.S. challenger Amanda Anisimova on Saturday afternoon at Arthur Ashe Stadium in New York to secure her second straight crown.
Bill Maher says RFK Jr. “has to go” after heated Senate hearing
After a heated Senate hearing, Bill Maher says RFK Jr. “has to go,” using Friday’s Real Time to echo calls for Health and Human Services Secretary Robert F. Kennedy Jr. to resign, branding him “nutty” amid a spate of firings and removals of top advisers and officials—when the comedian is the adult in the room, your Cabinet gig is circling the drain.