A 'jellyfish' UFO crowned by shifting coloured lights hovered above a Russian city for an hour before disappearing in the 1980s. The strange case is among a newly shared bundle of Soviet-era documents that lift the lid on how officials in the former USSR quietly recorded and assessed strange objects in the sky- even as they publicly dismissed visiting alien craft as Western nonsense. The material, translated into English and published by journalist George Knapp, spans around 70 pages and pulls