The ancient Greeks called it ‘philosophy’, literally the love of knowledge. Which knowledge? All of it, of course! Who are we, where are we going, how do things work, why, why, why… like children shooting questions to embarrass Daddy 🙂 . Then, very slowly, reality broke in: if Democritus could hypothesize atoms as in a dream, a couple of millennia later Rutherford would build a relatively accurate model of them, and not 30 years later they had become the greatest hope as well as the worst nightmare of humankind. Philosophy had grown into science. Watch its utterly intriguing growing steps here.