Why do we shake hands as a greeting?

The reason we shake hands has nothing to do with warmth or kindness and everything to do with mistrust. Just as we clink glasses so that if our companion has poisoned our drink he’ll get to drink some of his own poison (by virtue of contents slopping between glasses), we shake hands to check for concealed weapons.

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How did the First Telephone System Work : Diaphragms, Bells & Switches

This is one of those seminal inventions that can only work and ‘take off’ as a practical reality if you get a critical mass of people to take up the technology. In this article we look at some of the seemingly small, but vastly important, things that needed to happen in order for, what we take for granted today – the modern telephone system, to actually become a reality.

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