The 3,000-Year-Old Lens In 1850, archaeologist Austen Henry Layard was excavating in Assyria. He found a small polished rock crystal. It was Assyrian. Around 3,000 years old. Italian scientist Giovanni Pettinato studied it. He argued it could focus light like a lens. If true, the Assyrians had optics 2,000 years before anyone else.
Source
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