Galileo Galilei was the first to observe the rings of Saturn in 1610 using his telescope, but was unable to identify them as such. He wrote to the Duke of Tuscany that "The planet Saturn is not alone, but is composed of three, which almost touch one another and never move nor change with respect to one another. They are arranged in a line parallel to the zodiac, and the middle one (Saturn ...
A sifaka (/ ʃ ɪ ˈ f ɑː k / (); Malagasy pronunciation: [ˈsifakə̥] ()) is a lemur of the genus Propithecus from the family Indriidae within the order Primates.The name of their family is an onomatopoeia of their characteristic "shi-fak" alarm call. [citation needed] Like all lemurs, they are found only on the island of Madagascar.All species of sifakas are threatened, ranging from ...