Modern marvels with Ainissa Ramirez: Space Shuttle Ceramics

I think Anisa might be over-simplifying things at 0:44 when she says the thing that keeps the Shuttle from heating up is as simple as sand, particularly not sand as dirty as she shows right after that.

And, at 2:00 when she pours water onto the tile, it looks more like she really pours the water onto the metal ring above the tile. Yeah, the water sizzles there, but I can't really tell how much of the water hits the tile itself.