phyzguy's latest activity

The review article appears to cover only GRBs since 1997, because it's interested in redshift measurements which it says weren't made...

On time scales of thousands or millions of years, the engineering realities can change drastically. The engineering realities of Stone...

What does settling Mars have to do with space habitats?

You're being too planet-centric. The future of space exploration is living in space habitats that we construct. Try reading, "The High...

There have been discussions here of genetic and cultural drift. If we (or some other race) were to colonize the galaxy, it would take...

(1) Generation ships need not be "horribly inhumane". A space habitat hundreds of meters in diameter could be quite a pleasant place to...

I think the Fermi paradox is different than what has been stated here. I think it goes like this: (1) We can already envision our...

The thing to remember is that, if new life formed today on Earth, it would get eaten very quickly. So you can't conclude that life only...

I think that misses a triangle 1-24-20, for example, IIUC (see image in #2 above.)

The solution for the magnetic field of an arbitrary distribution of currents is well known. The attached summary is from the Feynman...

https://en.wikipedia.org/wiki/MoM-z14 Any photon with energy above 24.6 eV is going to ionize any atom. K, L X-rays would certainly...

https://cen.acs.org/pharmaceuticals/drug-discovery/vancomycin-derivative-targets-Gram-negative-bacteria/103/web/2025/12?sc=251211_sc_eng_...

Basically all large galaxies have super-massive black holes in the center. It's thought that the galaxy and black hole grow up...

It's a story. Just say there was a breakthrough in high strength materials that made the space elevator possible.

I enjoy pedantically correcting minor errors of virtual strangers I will never meet in person. For example, your first bullet item...