Classroom Activity for the NOVA program Newton's Dark Secrets: In Secret Symbols, students read and interpret a passage from a famous alchemical text titled The Twelve Keys of Basil Valentine ...

Secret Symbols. Sir Isaac Newton is ... In this activity, you will use a glossary of alchemical symbols to interpret a passage from a famous alchemical text called The Twelve Keys of Basil Valentine.

As a new exhibition looks at the concept of the loop, Joobin Bekhrad discovers how one symbol had different meanings in ancient Egypt, Hindu mythology and Renaissance alchemy.