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Rasmus Nyerup's quote reminds us of the tremendous scientific advances which have taken place in the 20th century.

Earth dating systems

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Scientists determined the Earth's age using a technique called radiometric dating.

Radiometric dating is based upon the fact that some forms of chemical elements are radioactive, which was discovered in 1896 by Henri Becquerel and his assistants, Marie and Pierre Curie.

There are over forty such techniques, each using a different radioactive element or a different way of measuring them.

However, to draw this conclusion we have to assume that the rate of cratering has been the same in the past as it is now.

And there are now good reasons for thinking that it might have been quite intense in the past, in which case the craters do not indicate an old age at all (see below).

Mountains, erosion, and variations in climate were considered to be punishment for the sins committed by humanity.

Buffon's Iron Sphere Experiments- On the basis of iron sphere cooling experiments, Frenchman Georges de Buffon estimated that the Earth would have needed 75,000 years to cool to its present temperature.

the age of the earth and the universe, and that includes the ones we have listed here.

Although age indicators are called ‘clocks’ they aren’t, because all ages result from calculations that necessarily involve making assumptions about the past.

Ages of millions of years are all calculated by assuming the rates of change of processes in the past were the same as we observe today—called the principle of uniformitarianism.

If the age calculated from such assumptions disagrees with what they think the age should be, they conclude that their assumptions did not apply in this case, and adjust them accordingly.

Over time, radioactive isotopes change into stable isotopes by a process known as radioactive decay.

Some radioactive parent isotopes decay almost instantaneously into their stable daughter isotopes; others take billions of years.