From the experiments on the environment has an effect on the state of mind; the growth of the rats Mr. ham, I feel that listening to music or slow music that has an effect on the growth and has the best possible state of mind; it is a changethere is sufficient rest as well as the increase in size, followed by the rats in the cage control is rarely has any change in size and weight, but the increase was due to a higher up.as follows: size and weight increase, at least not much rest (due to restrictions on Rats in a cage).
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