Nobody knows and nobody can prove how old the earth is . Nobody knows or can prove how old the universe is. I've always thought the immense time span given for earth's age was given to allow for the theory of Evolution. Eons of million year time spans are the magic elixir that allows for evolution. Instead of magic fairy dust they used incomprehensible lengths of time to allow for the changes in earth and its creatures. Since nobody knows or can prove earth's age I'm going with somewhere between 7 to 11 million years . I always liked those numbers and won a lot money with them......
--Tyr