In one of his dialogues, the Greek philosopher Plato cites his beloved teacher, Socrates, as saying that "philosophy begins in wonder." Plato's student Aristotle expresses a similar sentiment in his "Metaphysics": "It was their wonder, astonishment, that first led men to philosophize and still leads them."
In ancient Greece, of course, science hadn't yet emerged as a separate discipline. For many centuries thereafter, it would be termed "natural philosophy." Thus, for pre-modern thinkers — and, presumably, for most modern scientists — science, too, "begins in wonder."