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Cake day: September 27th, 2025

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  • This image is a reference to things like this, where you send dry (containing low water content) solvent through a column of activated alumina to make it even more dry.

    It doesn’t really work as well with some solvents. The one I used in grad school had DCM, toluene, THF, and acetonitrile. If we needed dry DMSO, DMF, DMAc, acetone, MEK, or alcohols they had to come from a sealed bottle.








  • SpaceX was founded in 2002, and announced Falcon 9 in 2005. By 2010 they launched, in 2013 they started propulsive landing experiments, and in 2015/16 they landed on a pad / a drone ship. About 13 years from founding to reuse, and ten years from F9 announcement to reuse.

    Blue Origin was founded in 2000, declared first stage reuse a priority in 2013, announced New Glenn in 2016, launched in early 2025, and landed in late 2025. 25 years from founding to reuse, and 9 years from NG announcement to reuse.

    I guess the difference is that SpaceX was making money in those intervening years, and Blue was content to, uh, do a lot of simulations I guess.



  • I understand your sentiment, but a lot of that isn’t right.

    Early iPhone apps were going for $10-20. So many developers being okay with just data harvesting plus so many devices out there made the $0.99 / free with ads model dominate – people got used to “free” apps from the big guys (Facebook, Google, whoever).

    iOS apps are pretty resilient to OS updates. They usually only totally break when huge changes happen (dropping 32-bit support, etc) and those happen once a decade.

    Tons of Windows software didn’t survive the 3.1 to 95 transition. A bunch died on 98 to XP, too. In the Apple world, a lot got left behind on the Mac when they went from PowerPC to Intel processors in 2007, or when they dropped 32-bit libraries.