IMAGE DETAILS

Mars Report Ref: MIA016

Report date: July-August 2017

Research Status: Open - Possible mechanical artefact

Description: Gear Wheel
Approximate size: 10 cm

Mission: Spirit Rover
Location: Gusev Crater

Found by: Larry Roy

Image date: Sol 288, Oct 2004
Image credit: NASA/JPL/Cornell

Graphics/image editing: M. J. Craig

Image source: (L) https://mars.nasa.gov/mer/gallery/all/2/p/288/2P151930506EFF8987P2418L7M1.HTML

(R) https://mars.nasa.gov/mer/gallery/all/2/p/288/2P151930506EFF8987P2418R1M1.HTML

OBSERVATIONS

The resemblance to a cog mechanism such as that which exists on a gear wheel (MIA016.4) is very strong. The fact also that crinoid fossils can also resemble such a shape (MIA016.3) should be noted.

POTENTIAL FOR AN ARTIFICIAL OBJECT

Regular, equally-spaced and sized spokes protruding from a circular rim. Circular centre. No object of similar character in the vicinity suggesting uniqueness.

COMMON EXPLANATION

Optical illusion. Ventifact.

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