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News Link • Science, Medicine and Technology

7 Advanced Ancient technologies we still Can't Replicate Today

• https://www.youtube.com, IndexSe7en

Roman Concrete - http://www.smithsonianmag.com/history...
Viking Compasses - http://www.livescience.com/44366-viki...
Silphium - https://en.wikipedia.org/wiki/Silphium
Flexible Glass - https://en.wikipedia.org/wiki/Flexibl...
Damascus Steel - https://en.wikipedia.org/wiki/Damascu...
Greek Fire - https://en.wikipedia.org/wiki/Greek_fire

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