The world’s first mass participation science experiment. Gravity actually varies slightly wherever you go.
So a case is travelling the world containing a set of scales and a test weight - a Gnome - to measure this phenomenon. Scientists can volunteer to weigh him and then record the data at,
the home of the campaign. The story has reached 355 million people in 152 countries and is a TED talk.
It is also on the educational curriculum in some countries.

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