If you're familiar with aerogel, you know that it's one of the lowest-density materials on Earth. But even if you're versed in this supermaterial's physical properties, you've probably never thought about what aerogel sounds like. This video answers that question.
I don't know what I was expecting, but... it certainly wasn't that. Even watching it a second or third time, there's something dissonant about the sound – like somebody took out the real noise and replaced it with the metallic clinkity-clink we have here. It seems like a weird sound, for something dropped from so small a height onto (what looks like) a wooden tabletop.