The usual Old English word for cloud was weolcan. In Middle English, skie also originally meant cloud. The four fundamental types of cloud classification (cirrus, cumulus, stratus, nimbus) were proposed by British amateur meteorologist Luke Howard (1772-1864) in 1802. Figuratively, as something that casts a shadow, from early 15c.; hence under a cloud (c.1500).
Thanks for the A2A. Okay, the most famous song in the world is no doubt 'Happy Birthday', followed by various Christmas carols (since the majority of human population is Christian indeed and since Santa is a really famous guy), folk songs, army marches and national anthems.
The Swan Song (Schwanengesang) is the nickname of the 1733 Baroque Concerto written by Georg Philipp Telemann: Concerto in D minor for oboe, strings and continuo.he phrase refers to an ancient belief that swans (Cygnus spp.) sing a beautiful song in the moment just before death, having been silent (or alternatively, not so musical) during most of their lifetime.