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First, let’s start with the Cambrian.
The Cambrian Life Explosion is a life explosion event that occurred 570 million years ago to 550 million years ago. Please note that this is not a big explosion, but a big explosion.
At that time, many ancestors of modern life were born. Based on this phenomenon, we are thinking about how life systems and brain systems have evolved to today.
1. Brain-the result of historical evolution