Lex, ask your dad about exotic plasmas from space, sprites and cosmic ray collisions with atmosphere.,(reply>), @Pinnedby Lex Fridman..  i sent an email to your dad a few years back and if he received it I don’t know. No reply anyways. Here it is. <br>Dear Alexander,<br><br>As earth plies its’ path through the solar system, several tons of all varieties of matter are donated in meteorites, daily. My question is, what amount of these meteorites become plasma balls and if so how long do they last? Can they transition from hot to cold and stay intact?  Can a plasma ball be attracted or repelled by an airplane or its’ avionics? Are plasma balls detectable on radar or could appear to be trying to jam radar because of the nature of plasma itself? Could plasma balls be moved in the atmosphere by creating a vacuum in a space next to the plasma ball? <br>Could reports UAP’s have hovered over missile silos be radioactive isotopes in the radioactive plasma of a uranium meteorite that has a quantum affinity for some atoms in a missle warhead?<br>Could EM beams from satellites influence trajectories of plasma balls?<br><br>I’m 62 and love Physics and can’t do the time to research such questions, so I reach out to your vast knowledge and ask if these are questions with answers or questions in need of answering. <br><br>Also, <br>Plasma Tunnel Boring and Plasma Tunnel Printing machine, combined. <br>Can such a machine be theoretically workable? Use the tunnel bore material to print the tunnel?<br><br>I hope you had a laugh if not a ponder and maybe a bud from me may bloom into an idea someone else has patented already. <br>I love the Universe because it is so bouncy bouncy and everything is waving at everything else. <br>Ross Kirkwood, Squamish BC,(reply>), Appreciate your time,<br>I’d share a beneficial knowledge<br>✎💬±𝟷𝟸𝟶𝟷𝟿𝟾𝟽𝟹𝟼𝟾𝟾