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:
“Every woman who vacates a place in the teachers’ ranks and enters an unusual line of work, does two excellent things: she makes room for someone waiting for a place and helps to open a new vocation for herself and other women.”
—Frances E. Willard (1839–1898)