By A Mystery Man Writer
The ancient shark tooth blades were most likely used in warfare, or for ritual purposes, according to the researchers.
Discovery of 4,500-year-old palace in Iraq may hold key to ancient civilisation, Archaeology
Blade Fish 7000 - その他
Archaeologists Discover 7,000-Year-Old Knives Made From Tiger Shark Teeth
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Smarthistory – War and Sacrifice: The Tomb of Fu Hao
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Blade Fish 7000 - その他
Prehistoric Swiss Army knife indicates early humans communicated - The University of Sydney
Bringing a shark to a knife fight: 7,000-year-old shark-tooth knives discovered in Indonesia
65,000-year-old 'stone Swiss Army knives' show early humans had long-distance social networks