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I'm not even sure how you get to 4000 years old from biblical literalisim.
Edit: going strictly by the biblical account, Adam lived to 930 years, and Noah 950. IIRC, their lives did not overlap. Jesus lived 2000 years ago. A whole bunch of stuff happens in between Noah and Jesus. So even if you're working strictly from the bible, how the hell do you get 4000 years?
So even if you’re working strictly from the bible, how the hell do you get 4000 years?
You can't. The "Young Earth" people are morons.
Because anti-evolutionists decided a myth that the Earth is only 4000 years old is the quickest way to refute claims of evolution.
It's not an argument one forms by observing evidence.
Lol, look at this guy, trying to use science and facts to disprove my fairytale. What a joke!
Yeah, No amount of evidence will cut through the fog of wilful ignorance here.
Lead 204 is entirely primordial and the other isotopes found on earth would be found at roughly the same concentration were all of the lead on earth primordial. It's the excess ratios of the other isotopes of lead that can be attributed to radioactive decay. That is a substantial proportion of the lead on earth, but to say the "existence of lead" is proof of the age of the earth is entirely incorrect.
But the half life of polonium 210 is just 138 days. other is a few days. radium 226 is 1602 years. Why couldn't the earth have started with a lot of radium 226? Checkmate round earthers.
Could have started with lead directly. Why go the extra mile.
I mean, the existence of lead doesn't necessarily prove the age of the earth so much as that those elements have existed for that long.
HOWEVER -- you're basically guaranteed to find lead in uranium deposits found around the earth, and the ratio of lead/uranium is how we calculated the 4.6 billion years.
Uranium is formed in Neutron stars or Supernova, so at the very least - the uranium found on earth itself is 4.6 billion years old. Whether "Earth" was "Earth" back then, who knows. This could be pre-moon? Could be before the earth even cooled down to have a solid outer layer? So the estimate is bound to be off by a little...
Just not by 4.5 billion years.
I'm pretty sure just soap has been around for more than 4.5k years and that means civilization too. So even if you do some backflips in justification here, there's no way you get 4k.