This last appeared in the Unicorn Corral. I think this evidence elevates it to Off-Topic Tech
It's not Lead into Gold. ....yet. But they are scraping interesting alloys off the 'inside' of the nested spheres.
So far the examples have the three or four stages separated by serpentine ducting. Productizing this might lead to a vertical stack or cluster.
Stick one in the back corner of an old school bus and go ecomodding.