by using the distance from Earth to various galaxies and by calculating the ages of old, nearby stars.
For example, observe the speed at which galaxies move away from each other, and extrapolate to the past. This will give a fairly good approximation of the age of the Universe, provided the distances...
Carbon dating is the first method which involves use of carbon isotope C-14. Another is determining the depth of the fossil.
Measure the distance from Earth to nearby stars.
By using the distance from the Earth to various galaxies and by calculating the ages of old, nearby stars