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Stories
The Pitch Drop Experiment and the Ninth Watch
Described as 'watching paint dry but much, much slower', UQ's Pitch Drop Experiment has a Guinness World Record for the world's longest running laboratory experiment.
In 1927, Professor Thomas Parnell decided to demonstrate that pitch, a derivative of coal tar or wood tar, has both solid and liquid properties. At a speed slower than continental drift, only eight drops of pitch have formed and fallen at UQ - and no-one has even seen one fall*.
The ninth drop is forming and the watch is on! If you're online when it falls, your name will be recorded for posterity. Join the watch at http://www.theninthwatch.com
The experiment's third custodian, Professor Andrew White, reveals the technology, the mystery and the fascination of slow science.
* The first drop of pitch recorded on film was at Trinity College Dublin on 11 July, 2013. Their experiment is younger as it started in 1944. You can watch the historic moment here: http://www.tcd.ie/Physics/tar-experiment/
Brisbane Line Contributor
Brisbane Line is 4ZZZ's flagship news program, produced and presented by a rotating team of volunteers it airs from 12pm - 1pm every Tuesday, Thursday, and Saturday.
Zedlines
ZEDLINES, FRIDAY 12 SEPTEMBER 2025 11AM
Your 11AM Zedlines with Chelsea and Toby
IMG: “Beautiful Reef” by Josh Krancer, CC BY-NC-ND 2.0
ZEDLINES, FRIDAY 12 SEPTEMBER 2025 10AM
Your 10AM Zedlines with Izzy and Emma.
Img: Credit Daniel Aragay on Wikimedia
ZEDLINES, FRIDAY 12 SEPTEMBER 2025 9AM
Your 9AM Zedlines with Toby and Chelsea
ZEDLINES, FRIDAY 12 SEPTEMBER 2025 8AM
Your 8AM Zedlines with Izzy and Emma
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IMG: @banksy_archive on Instagram
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ZEDLINES, WEDNESDAY 10 SEPTEMBER 2025, 11AM
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ZEDLINES, TUESDAY 9 SEPTEMBER, 11AM 2025
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ZEDLINES, TUESDAY 9 SEPTEMBER 2025, 10AM
Your 10AM Zedlines with Annisa, Eliza and Jaz
ZEDLINES, TUESDAY 9 SEPTEMBER 2025 8AM
Your 8AM Zedlines with Annisa, Eliza and Jaz.
ZEDLINES, MONDAY 8 SEPTEMBER 2025, 11AM
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Your 10AM Zedlines with Eve, Ruby and Olive
ZEDLINES, MONDAY 8 SEPTEMBER 2025, 9AM
Your 9AM Zedlines with Olive, Ruby and Eve
ZEDLINES, MONDAY 8 SEPTEMBER 2025, 8AM
Your 8AM Zedlines with Eve, Ruby and Olive
ZEDLINES, FRIDAY SEPTEMBER 5 2025, 11AM
Your 11AM Zedlines with Chelsea, Izzy and Toby
ZEDLINES, FRIDAY 5 SEPTEMBER 2025, 10AM
Your 10AM Zedlines with Izzy and Emma
ZEDLINES, FRIDAY 5 SEPTEMBER 2025, 9AM
Your 9am Zedlines with Toby and Chelsea
ZEDLINES, FRIDAY 5 SEPTEMBER 2025, 8AM
Your 8AM Zedlines with Lauren and Emma
ZEDLINES, WEDNESDAY 3 SEPTEMBER 2025, 11AM
Your 11am Zedlines with Alessia and Hope
Image credit: ABC
ZEDLINES, WEDNESDAY 3 SEPTEMBER 2025, 10AM
Your 10am Zedlines with Maritza and Alpine
Image credit: The West Australian
ZEDLINES, WEDNESDAY 3 SEPTEMBER 2025, 9AM
Your 9AM Zedlines with Sophie and Hope
ZEDLINES, WEDNESDAY 3 SEPTEMBER 2025, 8AM
Your 8am Zedlines with Maritza and Alessia
Image Credit: BBC
ZEDLINES, TUESDAY 2 SEPTEMBER, 11AM
Your 11AM Zedlines with Max, Eliza, Jaz and Annisa
IMG CREDIT : ALPHA , FLICKR
ZEDLINES, TUESDAY SEPTEMBER 2025, 10AM
Your 10AM Zedlines with Eliza and Max.