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RE: Sound: Here is Why Your Voice Can go Further on a Cold Day
When you mentioned the tin can telephone, I realized how much of childhood we've missed. For some of us, this was an unknown practical application of science. Unfortunately, the current generation do not have a first hand encounter of most of these childhood experiences.
Wonderful post, well done @greenrun
Quite impressive
It is always good to have a fantastic childhood with whatever is obtainable as a means of being happy or active. Thanks for your input