On his 1925 Arctic expedition, Admiral Donald B. MacMillan used singing eskimos to test the effectiveness of short wave radio as a communication tool for the world's navies. His experiments are credited with helping to open up previously "useless" radio frequencies.
In the picture, MacMillan is second from right. The guy standing behind him is Eugene McDonald, founder of Zenith Radio Corporation. His company built the special short wave radio gear used on the expedition. All others in the picture are the singing eskimos.
Nine Circles never entered a recording studio and performed only once, at a Dutch radio station in 1982. Unbeknownst to them the engineer recorded the session and over the years it was bootlegged over and over becoming a Flexipop cult track. [The singer] never found out about this until I rang her up [in 2011].