The katana's originated in the 15th century.
Muromachi Period (1392-1573)
during the medieval period of time
Kives and Dual Katanas
It originated in Greece, around the time period of 1138 and 1204 AD
I can tell you when but not where(cuz i don't know). They originated from the medieval time period.
No
Exactly where it is now, Stonehenge has not been moved. But for the idea behind its desgn see the link.
Yes, there are titanium katanas, but they are not traditionally made for use in combat or martial arts. Titanium, being a strong and lightweight material, is sometimes used in the construction of novelty or decorative katanas for display or ceremonial purposes. Traditional katanas are made of steel.
Integers were first used before the AD period in history. It is believed they were originated from Latin origins and developed after that time.
How much black vampire katanas are worth depends on the age and the condition. Some are worth upwards of 1,000 dollars.
The first pterosaur (Preondactylus) lived in the Late Triassic Period.
The same parts of the world that white and green tea originate from, as black tea is simply green tea that has been allowed to ferment (i.e. rot or decompose) for a period of time.