Take chimps to humans : 6 millions years. 10 years to produce some offspring : that's only 600000 generations
To be a success, a mutation would be transmitted to an offspring, replace a large number of the existing population, and only then be followed by the next "worthy" mutation
I do not know how many mutations are required to transform a chimp into a humain
An organic "feature" like flight or gills, or the ability to blink requires both hardware and software (to both create the hardware, and to run the new hardware.)
This, we're discovering, takes quite a lot of information. Organised, specific information in the correct order to harness maths, physics and chemistry to create a working feature.
To get such a feature off the ground by random point mutations using evolution by natural selection, each and every mutation needs to provide selective advantage, or it is discarded. Any progress to such a feature must start again from scratch.
There is a theory about how this can happen, it's well understood, but now we know much much more about how Biology actually works at the lower levels. So regarding the theory, people know that something needs to give, and it's not going to be maths, physics or chemistry, lets put it that way.
Take chimps to humans : 6 millions years. 10 years to produce some offspring : that's only 600000 generations
To be a success, a mutation would be transmitted to an offspring, replace a large number of the existing population, and only then be followed by the next "worthy" mutation
I do not know how many mutations are required to transform a chimp into a humain
I guess the number are not working