Carbon dating real fake
Let's say initially every radioactive element was "exploded" into existence from pre-existent elements.
None of these early faster half-lives would be the same as they are today.
were switched on, it would only be natural for them to behave according to their individual properties, eventually acquiring stable half-lives of decay, at different rates.
Carbon dating makes an animal living 4 thousand years ago (when there was less atmospheric carbon) appear to have lived thousands of years before it actually did.