Thousands watch world's longest-running lab experiment

A photo of the late John Mainstone with the pitch drop experiment at the University of Queensland...

A photo of the late John Mainstone with the pitch drop experiment at the University of Queensland in Australia. Mainstone died in August before he could see the ninth blob of pitch touch down in the beaker. He had missed all three drops during his custodianship. (Photo: Facebook/QMI Agency)

QMI Agency

, Last Updated: 12:18 PM ET

After waiting more than 13 years, Australian scientists got to see a drip of tar-like substance touch down in a beaker in the world's longest-running lab experiment.

The pitch drop experiment at the University of Queensland was set up in 1927 to show students solid materials can flow like liquids.

In the experiment pitch, a type of resin, is used. This is the ninth drop of pitch to fall during the course of the experiment.

No one has ever actually seen the drip touch down until the weekend of April 12 and 13.

More than 25,000 viewers from 158 countries registered to watch the live stream on theninthwatch.com. Scientists are now trying to determine the exact moment the pitch touched the last drip, which landed in 2000.

People are now watching to see when it will fall over and if the connection to the pitch at the top of the funnel will break.


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