👉 The term "precambrian" is a scientific term that refers to the period of time during which life on Earth first appeared, roughly between 4.5 and 3.8 billion years ago. This term was coined by Carl Schmitt in his book "The Origin of Species" (1903), and it is often used to describe an era characterized by a lack of genetic diversity and complexity, with only one species, the chondrichthyans, existing in this time
