Mark was pretty aggressive when he was in his early twenties. At the drop of a hat he became angry and was quick to act violently. Now Mark is 60 years old and is much calmer than he was back then. Mark's levels of the hormone have .

His testosterone levels decreased.

Explanation:

Mark's levels of the hormone testosterone have decreased.

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the language of nature was a manifestation from god as he said "let there be light" and there was light the world began to assume visible, comprehensible form.

what ever we know now think of the old vision of creation we can be sure that with out the speaking of word -without language- we would have no science today with its striking power to illuminate the world.