Magnifying glass
TL;DR
Magnifying glass - requires enrichment with adjacent possible narrative
speculative: the Nimrud lens may have been a magnifying glass, or just a decorative item. There are clear references to magnifying glasses in Aristophanes (5th century BC)
What Had To Exist First
Required Knowledge
- Glass
What This Enabled
Inventions that became possible because of Magnifying glass:
Biological Patterns
Mechanisms that explain how this invention emerged and spread: