The nanoarchaea can symbiose with actinobacteria, cyanobacteria, magnetotactic bacteria & spirochetes to form magnetotactic eukaryotes which would have evolved into multicellular magnetotactic eukaryotes called as magnetotactic symbiotic tissue organism protist network. This can evolve into multicellular eukaryotes like plants, animals & humans. Magnetoperception and magnetite nanocrystals are common among plants, animals & humans. Thus magnetite and magnetoperception would have played an important role in eukaryotic & human evolution. Magnetite and magnetoperception is present in multicellular eukaryotes, animals, plants and humans. The magnetite crystal network & actinidic magnetite nanoarchaeal networks in plants constitute the plant nervous system which is similar to human hindbrain autistic phenotype. Plants are capable of magnetoperception & quantal perception. The plant consciousness & intelligence can evolve into intelligent plant social structures with communication abilities. Human beings with global warming related actinidic magnetite nanocrystal networks can generate oxygen by water oxidation functioning as plant-like species or Homo planticus.