Originally Posted by tiptap
Estimating the universe or the Sun's or Earth's surely shows the length of time is much longer than 10,000 years. The half life knowledge of Uranium and Potassium isotopes with radioactive decays is easily obtained. And those time lengths are in orders of billions of years. And the decay of Potassium can include the production of the Noble Gas Argon. So measurements of any Argon in Potassium rich material indicates at least 100,000 years because that is the lowest age we can estimate from Argon detection measurement available to us. Mesurements put the age of Earth and Sun on the order of 5 billion years.
question for my own understanding, is it possible for radioactive decays to vary?