00:00A roaring 1,000-degree blowtorch threatens to instantly vaporize a delicate wax crayon.
00:06How does a solid block made of 99% empty air completely block that intense heat?
00:13Common sense says thin, porous glass should melt instantly,
00:17but the extreme structure traps heat energy completely.
00:21The tiny nanopores force thermal energy to travel the longest possible path around the empty space.
00:28That impossible defense leaves the crayon completely untouched
00:32while a roaring 1,000-degree blowtorch threatens to instantly vaporize a delicate wax crayon.
