77 pages matching brain in this book
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abstract actually alive ameba animals atoms average bacteria become bees birds blood body brain breathing called carbon dioxide cells century chemical chloroplasts complex consciousness course creatures crystal death didinium dimensions discovered dreams Earth eggs electric evidence evolution evolved fact feel feet female fish flowers fungi fungus genes genetic germination grow human hundred inch individual insects inside J. B. S. Haldane kind kingdom known later least less literally living male mammals mating meristem metabolism microbes microscopic miles million mind molecules muscle mysterious mystic nature negentropy nerve normal organism ovum oxygen paramecium parasites percent perhaps phosphenes photosynthesis plankton plants polarity presumably probably quick clay relatively roots seeds seems sense shape smell somehow sort space species spiritual sprouting stars superorganism surface swimming temperature termite things tiny transcendence tree turn universe vegetable viruses vital waves whole worms