I believe this rock called "Earth" is around 4-5 billion years old. Also that the universe it is part of was concentrated in one point about 15 billion years ago, at the origin of space time predicted by Aleksandr Friedmann and Georges Lemaître as a consequence of theory of general relativity--an event called the "Big Bang"*.
"This is the most beautiful and satisfactory explanation of creation to which I have ever listened." --Einstein (referring to Lemaître's talk in January 1933)
It's easy to agree with that--unlesss you practice scriptural literalism (denying scripture writers would use figurative language to illustrate concepts beyond human experience of that time), or the philosophy of materialism (denying existence of anything besides space time, matter and energy). The first is religious and the second non-religious, but both are fundamentalism: refusal to consider anything beyond their respective orthodoxies.
* Ironically, "Big Bang" originally was a derogatory term coined by adherents to "steady-state" theories of the universe. When the cosmic background radiation predicted by the Big Bang model was observed by Bell Labs, materialists proposed a cyclic model of eternally repeating Big Bangs ending in Big Crunches preceding the next Big Bang, ad infinitum. This theory, in turn, fell out of favor after 1998 when UC Berkeley determined that cosmic expansion is accelerating, rather than slowing as the cyclic theory predicts.