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A unit of museum experts tasked with investigating unexplained phenomenon have been left baffled by a mysterious substance, dubbed 'space slime'.

Carrying out work which would leave even The X-Files's Fox Mulder and Dana Scully stumped, the team at the Natural History Museum have been tasked with identifying a host of bizarre items discovered by the British public.

Among the finds examined by the museum's Identification and Advisory Service was a mysterious slime discovered in a peaceful nature reserve in Somerset.

The strange gloop, found at the Ham Wall nature reserve, mysteriously appeared around the same time as a meteor crashed to earth in Chelyabinsk, Russia, and an amateur photographer claimed he had captured a mysterious object whizzing through the sky above the park on camera.

The object appeared to be a meteor, although this was not confirmed by astronomers.

Nature buffs claimed the slime was merely frogspawn, while others said it was 'star jelly', a strange substance said to appear when meteors fall to earth, which has continued to stump scientists.