What is this little critter (see picture)? Where does it come from, what does it turn into andrnwhat was it doing pottering around my roses?rnPaul Martlew Wildwood, Staffordshire, UKrnPhotographs of the clock mechanism in the tower of the UK's Houses of Parliament (Big Ben) show coins on a tray attached to the pendulum being used to tune the oscillation period. Since we all know that mass doesn't affect the period of a pendulum, why is this done?
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