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Season 6, episode 39. This player now records resume state for the active profile so browse, account, and detail pages can bring you back here quickly.
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The Tool Bench: Hand Tools
Well over two million years before the evolution of modern man, his primitive ancestors were making tools. The use of tools is thought to be one of the keys to human evolution itself and it permeates nearly every aspect of history. We even measure history according to our ability to craft tools; the Stone Age, the Bronze Age, the Iron Age.
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Episode 10: Plastics