Dr. Robert Sungenis: "In actuality, the Light of the First Day is the original light, but on the Fourth Day the sun and stars were either formed from it or were created separately....the Bible insists that the original Light that was made on the First Day still exists in the universe today. There are other people who believe Evolution is a scientific fact. They believe the universe is at least 13 billions of years old and the Earth is 4.5 billion years. some of them also believe Genesis is a sacred record of how the world began, but insist that we are not to take every word of it literally. Hence, although they believe Genesis ! might be read in chronological or a semi-chronological order, they hold that each of the Six Days is actually billions of years long. This is also an incorrect way to read Genesis. The word 'Day' in the original Hebrew refers to a 24 hour period, not millions of years. .....some who hold to the Big Bang theory (which claims that everything in the universe came from a giant explosion some 13 billion years ago) believe that the creation of Light on the First Day refers to an immense primordial explosion which produced light. This is also an incorrect way to read Genesis. The first verse of Genesis insists that the Earth came before the Light, while the Big Bang claims that the Light came before the Earth."