In the 1990s, there had been a resurgence of Sardinian-language music, ranging from the more traditional genres (, , etc.) to rock (, , , etc.) and even hip hop and rap ("Dr. Drer e CRC Posse", "Quilo", , "Malam", , "Menhir", "Stranos Elementos", "Malos Cantores", "Randagiu Sardu", "Futta" etc.), and with artists who used the language as a means to promote the island and address its long-standing issues and the new challenges. A few films (like "Su Re", "Bellas Mariposas", "Treulababbu", "Sonetaula" etc.) have also been dubbed in Sardinian, and some others were provided with subtitles in the language. The first scientific work in Sardinian (), delving into the question of modern energy supplies, was written by Paolo Giuseppe Mura, Physics Professor at the University of Cagliari, in 1995.