Korszakalkotó felfedezések - Season 5 (2008) (évad)
Dokument / Történelmi
Egyesült Királyság,
2008, 42 perc
Tartalmak(1)
The Romans created a hydraulic mining system that blew millions of tons of material away. Ancient sappers dug under walls to bring a whole castle down. What technologies and techniques made these feats possible? (Amazon Prime UK)