Subject: Re: Richard Feynman explains why Mars a one way trip
Which is very different than actually providing an explanation of how aerogel could actually be used to block cosmic rays.

Simple. Dope it with something else. Like polyethylene, hydrogen or titanium carbide.

Some references for you
https://www.sciencedirect.com/...

https://ntrs.nasa.gov/citation...

https://newatlas.com/materials....

…along with many others.

And this is…existing research. I’d suggest you modify your tone on these subjects.

Otherwise, you're just engaging in wishing away the actual impediment to space exploration.

lol. Hey, if you say so.
Thank you for proving my point that curiosity and problem solving are endemic in folks who just don’t care for the space program. It explains a lot.