phyzguy's latest activity

I agree it is not a physical object, but it is a well defined structure. Where does that structure reside if it is not in our universe?

I'm not sure I agree that group theory was invented. The axioms of group theory were chosen the way they are because it leads to...

I agree. It's clear that those constants were discovered, not invented, but I'm not sure everyone would agree. I chose the monster...

I chose the monster group because to me it is obvious that nobody could have invented that structure. Yes!! I think that must be the...

My example to the "is mathematics invented or discovered?" question is the monster group. This is the largest simple group, with...

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.)

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...