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Why the alchemists couldn't build rockets — LessWrong
18+ hour, 37+ min ago People sometimes ask why theory is so important, and recently I've been reading John D. Clark's wonderful book Ignition!: An Informal History of Liquid Rocket Propellants, and I've started thinking rocketry and chemistry provide a good example. Chemistry turned manufacturing new…...
Deep Learning and Precipitation Reactions: A Tale of Universality — LessWrong
3+ day, 10+ min ago Author Note: I doubt I am the first person to have these ideas, as I think they're somewhat of a natural perspective. Also, there's a fair bit of handwaving and oversimplification here to keep the post digestible. I suggest for…...
Every house has a chemistry lab — LessWrong
1+ week, 5+ day ago Published on December 9, 2025 2:17 PM GMTGrandma's Kitchen'by Jacek Yerka.'Source.It is equipped with heat sources of various kinds, heat-resistant containers, a hob to evacuate toxic gas, instruments to manipulate reactive material adapted to different textures, measuring equipment, and, importantly, a…...
[Linkpost] "Higher glass transition temperatures reduce thermal stress cracking in aqueous solutions relevant to cryopreservation" — LessWrong
3+ week, 4+ day ago Published on November 26, 2025 9:52 AM GMTI found this on Reddit; it's an open access journal article relevant to cryopreservation of organs (including brains).Abstract:Cryopreservation by vitrification could transform fields ranging from organ transplantation to wildlife conservation, but critical physical challenges…...
Optical rectennas are not a promising clean energy technology — LessWrong
3+ mon, 1+ week ago (For some relevant background context, check out my write-ups on the fundamental efficiency limit of single-junction solar cells, and on the thermodynamic efficiency limit of any solar energy conversion technology whatsoever.) Rectenna is short for "rectifying antenna, i.e. a combination of…...
Detecting High-Stakes Interactions with Activation Probes — LessWrong
4+ mon, 4+ week ago This research was completed for'LASR Labs 2025 by Alex McKenzie, Urja Pawar, Phil Blandfort and William Bankes. The team was supervised by Dmitrii Krasheninnikov, with additional guidance from Ekdeep Singh Lubana and support from David Krueger. The full paper can be…...
On The Shoulders Of Substrates—how one phenomenon lays the foundation for the next — LessWrong
5+ mon, 12+ hour ago If you'll cast your mind back to Emergence Vs Entropy, we found, in order to overcome entropy, an emergent system, like our planet, benefits from a consistent stream of energy from the sun " creating a substrate for life on earth....
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