Today I Learned

[Yuli Ban]

[Yuli Ban]

This is particularly fascinating! Just shows how humans across time had to do things we can accomplish so easily now, with extra creativity to boot. I wonder if any other arid-biome society independently developed this method.

[Yuli Ban]

[Yuli Ban]

[Yuli Ban]

[Yuli Ban]

[Yuli Ban]

[wjfox]

A good and succinct explanation of the forces and states of matter leading to a neutron star and black hole:

https://www.daviddarling.info/encyclope ... atter.html

Electron degenerate matter

Electron degenerate matter is a form of degenerate matter in which the weight of overlying material tries to force all of the electrons surrounding the atomic nucleus into the lowest energy quantum state. The electrons resist, because of the Paul exclusion principle, and so exert a pressure, known as degenerate electron pressure or electron degeneracy pressure, that halts further collapse. This pressure is sufficient up to the Chandrasekar limit of about 1.4 solar masses. However, beyond this critical mass, gravity overwhelms the degeneracy pressure and results in further collapse.

[raklian]

[Yuli Ban]

Phantom kangaroo

A phantom kangaroo is a report of kangaroos, wallabies, or their accompanying footprints in areas where there is no native population. Some explanations put forth are escaped zoo or circus animals (as in the UK), or publicity stunts by local businesses using photographs from Australia. Others suggest outbreaks of such sightings are a form of mass hysteria.

[wjfox]

I wasn't aware of the static charge effect in N95s.

i.e. This is more important than the size of each virus and the filtering widths.

TIL...

[wjfox]

[Member]

https://www.google.com/advanced_search
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[Yuli Ban]

[citali_]

...that I'm not even close to being middle aged:

https://www.yourtango.com/experts/joan- ... ed-elderly

This is a downer for me since I have always wanted to be older than I am. And even middle age isn't old enough....I guess I'll have to wait.

Hm. As I type this I have changed my mind. Posting this as is though!

[wjfox]

...that I'm not even close to being middle aged:

https://www.yourtango.com/experts/joan- ... ed-elderly

I guess I still have 2 years before middle age, then.

[citali_]

...that I'm not even close to being middle aged:

https://www.yourtango.com/experts/joan- ... ed-elderly

I guess I still have 2 years before middle age, then.

I've completely changed my mind about this! I'm embracing my age. Making the best of it!

[wjfox]

[Yuli Ban]

[citali_]

....that I can do anything!