Q: Why doesn’t life and evolution violate the second law of thermodynamics? Don’t living things reverse entropy?
The second law of thermodynamics is sometimes (too succinctly) stated as “disorder increases over time”. Creatures, both in the context of growing and reproducing, and in the context of evolution are definitely not closed systems. Doing all of that certainly involves an increase in order, but at the expense of a much greater increase in disorder elsewhere. In fact, the entropy (as used/defined in thermodynamics) of most animals (by weight) is all about the same. You can think of this huge sunlight-to-re-radiated-heat increase in entropy like water going over a waterfall, and life as being like a hydro-electric dam.