Imagine a science experiment so slow that it’s been running for nearly a century, and yet, it’s still not finished. This is the Pitch Drop Experiment, the world’s longest-running continuous scientific endeavor—and it’s about to hit a milestone that has everyone on the edge of their seats. But here’s where it gets fascinating: the next drop of this incredibly sluggish material could fall this year… or it might take until 2027. Either way, you’ll want to keep your eyes peeled—just don’t blink!
It all began in 1927 when Thomas Parnell, a professor at the University of Queensland in Australia, wanted to teach his students a lesson about fluid mechanics. To illustrate how materials can defy expectations based on their viscosity, he chose pitch, a substance that looks solid but behaves like a liquid over time. Pitch is a viscoelastic material, meaning it sits on the blurry line between solid and liquid. When struck with force, it shatters like glass, but given enough time—and we’re talking years—it flows like molasses. Its viscosity is mind-boggling: roughly 230 billion times greater than water. Parnell’s goal? To demonstrate this by letting a sample of pitch flow through a funnel. Sounds simple, right? But this is the part most people miss: it took three years just to set up the experiment. Parnell had to melt the pitch, pour it into a sealed funnel, and wait for it to cool and stabilize—a process that proved far more tedious than expected.
The experiment officially started in 1930 when Parnell cut the tip of the funnel, likely in front of a captivated classroom. And then… nothing. For eight long years, not a single drop fell. Finally, a large black drop formed, slowly detaching and dropping into the beaker below. The irony? No one was there to witness it. Parnell also missed the second drop in 1947 and passed away a year later, never seeing another drop fall.
Fast forward to today, and the experiment is still going strong, 96 years later. Only nine drops have fallen since 1930, the most recent in 2014. The scientific community is now eagerly awaiting the tenth drop, which could happen anytime this decade. But here’s where it gets controversial: the interval between drops has increased significantly since 1988, when air conditioning was installed in the building. The cooler temperatures slowed the flow even more, stretching the wait to around 12 to 13 years. Was this an unintended consequence of modern convenience, or a reminder that even the slowest experiments can be influenced by external factors?**
If you’re hoping to catch this historic moment, you’re in luck. The experiment is now live-streamed, so you can watch from the comfort of your home. Will you be the one to see the next drop fall? And more importantly, what does this experiment teach us about patience, precision, and the unpredictable nature of science? Let us know your thoughts in the comments—this is one conversation that’s sure to flow as slowly and thoughtfully as the pitch itself.
