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 ...

Newly published documents detail investigations into strange aerial phenomena, including several close encounters ...

This is just one of many stories found amongst Soviet-era files that have been recently released to the public.

Stolen Soviet files released by George Knapp reveal a massive cover-up of UFO encounters, giant aliens, and abductions ...

Soviet-era UFO files released by journalist George Knapp detail Cold War sightings, including a 'jellyfish-shaped' craft, ...

Striking images of bright “ red jellyfish ” appearing in the sky above storm clouds have sparked a wave of speculation online, with some social media users even floating theories about alien activity.