As tigerpaw pointed out, for the first 3.5bil yrs or so it was world of the very small, the microscopic, the single celled bacteria & organisms that ruled. Its mind expanding to remember these multifarious forms from the very beginning had been born but adapted themselves to every kind of concievable envirionment/habitat. Then we see this kind of a 'big bang' of more complexity speciation & morphology occur back 600mil yrs or so, as if such foundations were laid in that long early history before. We know that early cells show light sensitivity, or the complex tiny motors of flagellum, hailing future expression as life starts to really emerge.
One amazing aspect is knowing there were almost total life ending extinction events that resets much of that progress along the way, but some microscopic life always manged to endure. We eventually see this evolution of mega fauna which includes insects,once life does take off wants to go big,bigger & massive, what an amzing story but begins with the very small , microscopic laying the foundations for the first 3bil yrs. |
