anchor: Santorini looked exactly like many of the other islands in the Cyclades until around 1500 b.c. , when a massive eruption of its volcano carried the whole interior of the island high into the atmosphere, changing the climate of the earth for years afterwards.
positive: A massive eruption in 1500 b.c. changed the entire climate of the earth.
negative: Santorini has always look like all the other islands, the mountain is a volcano but it isn't active.