Neurons on Mars

Added on Oct. 1, 2011:
Why they were neurons.

Neurons are unique in their shape and size. That is to say no other things resemble them. Most neurons of Earth are shaped like stars and range from 4 microns to 100 microns in diameter (Ref.: [link to www.enchantedlearning.com]

The particles marked in the microscopic image
[link to www.wretch.cc]
resemble the shapes of neurons but look a bit larger than 100 microns across (roughly 100 to 200 microns across). However, they could not be mineral fibers or shadows or cracks or burrows created by bacteria.

The reasons include:
1. Mineral fibers are all straight except asbestos. Asbestos can be curly but they never grow into star/pyramidal shapes with curly threads as neurons do.
2. They are not shadows, as there is nothing near that can project shadows of star/pyramidal shapes.
3. They are not cracks, as no cracks/fractures take the shapes of stars/pyramids of 100 to 200 microns across.
4. They are not burrows created by bacteria, as no burrows resemble the shapes of stars/pyramids of 100 to 200 microns across.

Anyway, who says Martian neurons must be smaller than Earthly ones?

[link to en.wikipedia.org]