How fast can Epigenetics Act?

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The answer seems to be very fast. A recent archeological find of bison bones shows that the cold environment caused the animal to rapidly grow long hair to survive. This was done without alteration to its DNA. This archeological find is important because it proves not only DNA can be found in these ancient bones but epigenetics as well. The big question that remains is “Does these epigenetic changes influence long-term evolutionary changes?”

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