They are regularly eaten in the Mediterranean I would have thought the Greeks and Romans would have been aware of them.
[Edit] From this Minoan jar and this Roman mosaic I think I can conclude that both civilisations probably were aware of them.
(, Sat 28 Jul 2007, 13:35, archived)
I'm just intrigued that we use a Latinised Greek word and wondered what word the Romans used.
(, Sat 28 Jul 2007, 13:46, archived)