tlyudacris: kcjo: Aerogel, also know as frozen smoke, is the world’s lowest density solid, clocking in at 96% air. If you hold a small piece in your hand, it’s practically impossible to either see or feel, but if you poke it, it’s like styrofoam.
tags:
original: https://forthecheesecake.tumblr.com/post/22275816438