Octopus brains may have grown smart from an enormous diversity of microRNAs that let them grow multiple types of brain cells.
Octopuses may have gained some of their exceptional intelligence from the same evolutionary process that humans went through, a new study suggests.
"If you want to find out about the intelligence, or the brains, of an alien, a good model for that is studying the octopus," study senior author Nikolaus Rajewsky, a systems biologist at the Max Delbrück Center for Molecular Medicine in Berlin, Germany, told Live Science."The evolution of its complex brain, and the cognitive features that come with it, happened completely independently from us.
MiRNAs are tiny chunks of RNA that bind to protein-coding RNA strands, regulating their activity and silencing the expression of certain genes. This enables the genome to be more finely tailored to specific purposes, creating new types of brain cells that can be chained into more elaborate neural webs.
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