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.
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Famous quotes containing the word unusual:
“... it was not very unusual at Washington for a lady to take the arm of a gentleman, who was neither her husband, her father, nor her brother. This remarkable relaxation of American decorum has been probably introduced by the foreign legations.”
—Frances Trollope (1780–1863)