What else do you want to discuss about it?
Everything! I've been getting buried in cut and paste nonsense about 'Flood Geology' for the last 2 weeks, and the ONLY reason to engage in that weirdness would be if there was a theological concern. There's not. There's no reason to posit any of this, the embattled lone geologist who can only get his paper published in a country where they can't read the language...the conspiracies of hundreds of thousands of scientists...it's all needless!
And, this leads directly and obviously to the issue: There's no reason to oppose anything about modern Earth science. None of it. There's no reason to build a edifice in opposition to it...and edifice that, since it is opposition to the people actually doing the work of investigation, will always be just an amateurish attempt to 'sound scientific'.
It's contrary to the mission of the faith, which is to save souls by converting them to the one true faith. Augustine knew that pseudo-science turned people away - it still does. It's time to ask 'What are we doing here? Are we interested in converting people, or not? If we are, we need to stop tilting at windmills.'
How long have human beings been on the earth?
Since God breathed into Adam.
When did this happen? I don't know. As a Catholic obedient to Pope Pius XII, I can investigate the relevant anthropology. The relevant anthropology can only offer tantalizing bits of information.
So, go on...what was the question you were really asking? I've learned that nothing is ever as it seems here. You had some ulterior motive, go on and spill it. In the time it took you to phrase the false question, you could have phrased the real one...