What are some of the most interesting nanoparticles found in nature (not manufactured in the lab)?

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Muhammad Ismail Popular answer

Fullerene

Syed Salman Hashmi

I can think of Fullerene, also commonly known as bucky balls. Graphene might also be an example but I m not sure of it.

Go through the attached file for some of the nano particles produced due to naturally occurring phenomenon

Cody Landry

A fun one is the nanostructures on the lotus leaf that causes water to bead up and roll off due to increased surface tension. There is also thought to be magnetic nanostructures inside the bodies (maybe beaks?) of some birds that allow them to align them selves with the earths magnetic field, look up magnetoreception.

Muhammad Ismail