Over the decade it became clear that the 1970s were a hotbed of experimental, unique and mind-expanding design - perfectly mirroring the progressive music of the time as well as the technology of music recording and photography and being an expansive step away from the 1960s optimism. The seventies are often regarded as a mean, dark and turbulent decade, full of discontent and pessimism. The album covers of the burgeoning hard rock, progressive rock,...