But as much as our understanding grows of all of these things, there is one question we still cannot answer, and this is, where are we coming from? And you know, it's getting worse, because we won't be able to find the physical evidence of where we are coming from on this planet, and the reason being is that anything that is older than four billion years is gone.
Hoewel onze kennis over deze zaken toeneemt, blijft er één vraag onbeantwoord: 'Waar komen we vandaan?' Wat erger is: we kunnen geen tastbaar bewijs vinden van onze oorsprong op deze planeet, want alles wat ouder is dan vier miljard jaar is verdwenen.