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  2. Human brain - Wikipedia

    en.wikipedia.org/wiki/Human_brain

    Neurons connect to form neural pathways, neural circuits, and elaborate network systems. The whole circuitry is driven by the process of neurotransmission. The brain is protected by the skull, suspended in cerebrospinal fluid, and isolated from the bloodstream by the blood–brain barrier.

  3. List of human evolution fossils - Wikipedia

    en.wikipedia.org/wiki/List_of_human_evolution...

    (The Black Skull) 2.50 Paranthropus aethiopicus: 1985 Kenya: Alan Walker: BOU-VP-12/130 [24] 2.50 Australopithecus garhi: 1997 Ethiopia: Yohannes Haile-Selassie: STS 71 [25] 2.61–2.07 Australopithecus africanus: 1947 Sterkfontein, South Africa: Robert Broom and John T. Robinson: Ditsong National Museum of Natural History STS 52: 2.61–2.07 ...

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