Lernaean Hydra
c. 1400 BCE – 400 CEattested
Lerna, Argolis
- Greek
Grew two heads for every one cut off, which is why the word still describes any problem that multiplies when you attack it directly.
Known for
- regenerating heads
- venomous blood
- defeated by cauterising
Dates are estimates. A great deal of what this atlas covers is only datable to within a century.