Unusual Characteristics
In the 1970s Etna erupted smoke rings, one of the first captured events of this type, which are extremely rare. This happened again in 2000.
Read more about this topic: Mount Etna
Famous quotes containing the word unusual:
“Because of the unusual remoteness of Russia, and because of nostalgia’s remaining throughout one’s life an insane companion, with whose heartrending oddities one is accustomed to put up in public, I feel no embarrassment in confessing to the sentimental stab of attachment to my first book.”
—Vladimir Nabokov (1899–1977)