In a quiet corner of a physics building in Australia, a glass funnel filled with a tar-like substance has been dripping so slowly that only nine drops have ever fallen. As it approaches its centenary, ...

An experiment started in 1927 by Thomas Parnell aimed to prove pitch is a super-viscous fluid. Over 96 years, only nine drops have fallen from the funnel, with scientists waiting decades to witness ...

Sticky challenge One of the 37 pitch-drop experiments sent by Trinity College Dublin’s School of Physics to secondary schools all over Ireland. (Courtesy: Karl Gaff, TCD School of Physics) Nothing is ...

What if a material that looks solid could actually flow… over nearly a century? Launched in 1927 by an Australian professor to illustrate viscosity, an experiment of disarming simplicity has become a ...