Note that the only proponent of the man-made theory mentioned is Graham Hancock, a somewhat infamous Atlantis-chasing pseudoscientist and overall purveyor of extremely flimsy "ancient civilization" theories.
That doesn't mean that there aren't also legitimate archeologists who might be excited about these prospects, but the lack of their mention is...suspicious.
That doesn't mean that there aren't also legitimate archeologists who might be excited about these prospects, but the lack of their mention is...suspicious.