the instrument is made from the trunk of a mulberry tree, the head from an animal skin such as goat, and the strings from the intestines of young goats (gut) or nylon. the top two teams moved on to the second stage. in truth, the two are indeed friends, but little they are willing to admit it. the ideal would be to make concrete that is carbon neutral or even carbon negative. this divide is said to mimic the function of the gate. as of march 2020, the paper had been downloaded more than a half million times. 