Readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific conceptsWe know that in ancient Rome and Greece they had die-stamped coins. Why then did it take until the 15th century for mankind to invent the printing press?Kris Jones, London, W14 Continue reading…
Source : theguardian.com
Read more…Why, if the ancient Greeks had die-cut coins, did we take so long to invent the printing press?















