A "radically different" flat map of the Earth has been produced by scientists who say it is more accurate than any previous 2D models that came before. The two-sided map is made up of two circles ...
Cardboard piece, 20-by-25 centimeters or larger (It should be either thick cardboard or two layers of regular cardboard so the pushpins do not stick through.) Two assistants (The activity can be done ...
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