Mod note: This is a split thread from Entropy and evolution controversy. Life can also lead to a 'global reversal of entropy', in more than one way. Localized microbial life can concentrate certain metabolic precursors to one area of a hydro/atmosphere, decreasing the entropy of mixing at the incomplete expense of heat. On the other hand intelligent life can create machines which reverse the entropy of closed systems. These can be machines that produce work or simply contraptions which decrease entropy of a system to show that it can be done. Both microscopic and macroscopic life, and so evolution, can lead to a reversal of global entropy.