Anonymous User asked: does the earth have a birthday?
Sure it does, but pinning down when it is would be an impossible task. And what counts as the earth being born and what counts as the gestation period? Was it born when the first rocks started smashing together? When it started forming more of a ball shape? When life started to form? Going by that one, by our knowledge, none of the other planets in the solar system were "born", but I don't have a problem saying that because our particular rock is so deeply inoculated with life that its not that different from an organism filled with cells and bacteria and nematodes like you and me are