Scientists discover memory systems in slime molds.
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Researchers at the University of Sydney have found that brainless slime molds have memory systems. According to a university report, brainless slime molds use excreted chemicals as a memory system. Researchers say that the finding supports the theory that an external spatial memory was the first step in the evolution of memory.
“We have shown for the first time that a single-celled organism with no brain uses an external spatial memory to navigate through a complex environment,” said Christopher Reid from the University of Sydney’s School of Biological Sciences in a statement. “Our discovery is evidence of how the memory of multi-cellular organisms may have evolved – by using external chemical trails in the environment before the development of internal memory systems.”