3. Reading Glasses
カートのアイテムが多すぎます
カートに追加できませんでした。
ウィッシュリストに追加できませんでした。
ほしい物リストの削除に失敗しました。
ポッドキャストのフォローに失敗しました
ポッドキャストのフォロー解除に失敗しました
3. Reading Glasses
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著者：
Imagine if reaching your 40s came with a silent unavoidable tax that could end your career? For centuries, the natural hardening of the lens in the human eye did exactly that, forcing master craftsmen and scholars into unwanted early retirement.
A nameless 13th-century Italian began a revolution by creating the clearest lenses to correct this problem, but why did this rare luxury take centuries longer to become a mass-market necessity?
In this episode, we unpack the history of the spectacles, from state secrets protected by assassins, to the explosion of demand brought on by populist gossip and the work of Johannes Kepler, who mapped not only the planets but the properties of lenses, despite his own severe vision impairment.
Also, discover the bizarre engineering link between fish eyes and cameras, and a simple solution you can use if you forget your glasses.
Join Richard and Geoff to uncover the story of the ultimate "invisible tech".
Connect with us! Explore more deep dives into the epic engineering behind the invisible stuff you take for granted every day:
Website: commonknowledgeclub.com
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