Overlapped Neuron Remains on Mars

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NASA's Mars rover Curiosity acquired the above micrograph on Nov. 3, 2019 (Sol 2575) at Central Butte, Mars.
Each yellow circle contains more than one neuron fossil. Note that neuron fossils sometimes overlapped or stacked together.
Red arrows point to individual neuron fossils. Some types of animal on Earth have neurons larger than 1 mm across.

See also: numerous neuron remains on Mars and in meteorites:
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