Outside the range of recorded history, calibration of the 14 clock is not possible.This means the above calculations are only evolution speculation and NOT backed up by real science.
A 10 gram sample of U-238Now that has changed, and some important discoveries are being made.
Peaks on the landscape correspond to genotypic frequencies at which the average fitness is high, valleys to genotypic frequencies at which the average fitness is low. adaptive logic: A behavior has adaptive logic if it tends to increase the number of offspring that an individual contributes to the next and following generations.
If such a behavior is even partly genetically determined, it will tend to become widespread in the population.
In early 19th-century Britain, "Diluvialism" attributed landforms and surface features such as beds of gravel and erratic boulders to the destructive effects of this supposed global Deluge, but by 1830 geologists increasingly found that the evidence only showed relatively local floods.
Attempts were made by so-called scriptural geologists to give primacy to literal Biblical explanations, but they lacked background in geology and were marginalised by the scientific community, as well as having little influence on the church.
The "theories of the Earth" of the 17th century proposed mechanisms based on natural laws, within a timescale set by the biblical chronology.