[Blood of Tyrants]

Radiation and other mutagens have never shown to cause postive mutations. Scientists have raised literally thousands of generations of fruit flies in labs and have subjected them to every type of mutagenic compound or ray known and have yet to produce a BETTER fruit fly. Also, every cell contains an elaborate method of making sure that it's DNA does NOT change. It is the change and breakdown of our DNA that causes aging and many types of disease.

[js1138]

It is the change and breakdown of our DNA that causes aging and many types of disease.

And yet our lifespan of threescore and ten has remained pretty constant over thousands of years of recorded history.

And humans have only 300 generations in 6000 years, whereas bacteria have undergone upwards of 10 million replications. Bacteria have a genome almost as complex as ours. Why hasn't it deteriorated?