Superfluid Helium #1 Post by mpiedrav » Wed, Feb 05, 2020, 4:39 PM UTC Superfluid Heliumm.youtube.com
Re: Superfluid Helium #2 Post by mpiedrav » Wed, Feb 05, 2020, 4:41 PM UTC From "Sonda" (1977-1989), a Polish science show.