Sometimes science can be painfully slow. Data comes in dribs and drabs, truth trickles, and veracity proves viscous.

The world’s longest-running lab experiment is an ongoing work in sheer scientific patience. It has been running continuously for nearly a century, under the close supervision of several custodians and many spectators – and it’s ever so slowly drip, drip, dripping away.

It all started in 1927, when physicist Thomas Parnell at the University of Queensland in Australia filled a closed funnel with the world’s thickest known fluid: pitch, a derivative of tar that was once used to seal ships against the seas.