Someone here mentioned the idea that making objects very cold was a more plausible source of unexpected physics leading to extinction than high energy physics because high energy events occur in the atmosphere all the time whereas there's no reason to expect any non-artificial cause of temperatures in the millKelvin range. Does someone have a source for this observation? I'm writing a post where I'd like to attribute this properly.
Can't be so bad:
Macroscopic object (40kg) cooled to 77 nanokelvin:
https://news.mit.edu/2021/motional-ground-state-ligo-0618
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Previous Open Thread
Next Open Thread
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.