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BigBrain: An ultra-high resolution 3-D roadmap of the human brain
"Freely available reference brain shows virtual human brain anatomy in fine detail."

The Human Brain Project

How Big is a Micron?
"A "micron" is an abbreviated term for "micrometer", or a millionth of a meter (1/1,000,000 meters)."

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Mapping The Human Brain:
See-Through Brains:
Slow-Mo Scorpion Sting: