Update: Jonas Salk said: If all the insects were to disappear from the earth, within 50 years all life on earth would end.
Attila (opera) Attila is an opera in a prologue and three acts by Giuseppe Verdi to an Italian libretto by Temistocle Solera, based on the 1809 play Attila, KÃ¶nig der Hunnen (Attila, King of the Huns) by Zacharias Werner. The opera received its first performance at La Fenice in Venice on 17 March 1846.
About the opera Rusalka. Rusalka (Czech) (help info) is an opera ('lyric fairy tale') by Anton n DvoÅ k. The Czech libretto was written by the poet Jaroslav Kvapil (1868-1950) based on the fairy tales of Karel Jarom r Erben and BoÅ¾ena NÄmcov. Rusalka is one of the most successful Czech operas, and represents a cornerstone of the repertoire of Czech opera houses. A Rusalka is a water sprite from Slavic mythology, usually inhabiting a lake or river.