Glass in the Desert

 So, there is a field of glass in the Aracama Desert, and we now know for sure what caused it.

Investigating the glass fragments found mineral grains that don't occur naturally on Earth. Some of them were found in the comet sample return mission in 2004.

It appears that we had a comet air burst. Interesting, it coincides with about the time humans arrived in the area.

I would love to poke around in the stories of the indigenous people to see what they remember about it.