It’s been a good run for ectoplasm, but the award for world’s most mysterious fluid has finally changed hands.
The new title holder was discovered leaking from the roof tiles of a closed branch of Debenhams.
Researchers have been unable to establish what the substance is, although it is believed to have accumulated over the last five years. One sample is understood to contain the faint sound of a man asking where the toilets are.
Dr Fothergill, who oversees fluid categorisation, said ectoplasm had “served the field well, but I’m afraid it’s been topped”.