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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/
Zedlines
ZEDLINES, THURSDAY APRIL 2nd, 10AM
Your 10am Zedlines with Stella, Eden, Sarah and Vivek.
ZEDLINES, THURSDAY APRIL 2ND 2026, 9AM
Your 9am Zedlines with Eden, Vivek and Sarah.
ZEDLINES, THURSDAY APRIL 2ND 2026, 8AM
Your 8am Zedlines with Stella, Sarah and Vivek.
ZEDLINES, WEDNESDAY APRIL 1 2026, 11AM
Your 11AM Zedlines with Lachlan and Hailey
ZEDLINES, WEDNESDAY APRIL 1 2026, 10AM
Your 10AM Zedlines with Cass and Georgie.
ZEDLINES, WEDNESDAY APRIL 1 2026, 9AM
Your 9AM Zedlines with Lachlan and Hailey.
Image Credit: youngestchild, Flickr
ZEDLINES, WEDNESDAY 1 APRIL 2026, 8AM
Your 8AM Zedlines with Hailey, Cass, Lachlan and Georgie.
Image credit: Kai Stachowiak
ZEDLINES, TUESDAY MARCH 31 2026, 11AM
Your 11AM Zedlines with Clementine and Livinia
ZEDLINES, TUESDAY MARCH 31 2026, 10AM
Your 10AM Zedlines with Clementine and Livinia
ZEDLINES, TUESDAY MARCH 31 2026, 9AM
Your 9AM Zedlines with Livinia, Mack and Clementine
ZEDLINES, TUESDAY MARCH 31 2026, 8AM
Your 8AM Zedlines with Clementine and Livinia
IMG: From Wikimedia Under CC3.0
ZEDLINES, MONDAY MARCH 30TH 2026, 11AM
Your 11AM Zedlines with Miko, Niamh and Sarah
Image via Wage Peace
ZEDLINES, MONDAY MARCH 30TH, 10AM
Your 10am Zedlines with Miko, Niamh & Sarah. (IMG: Via Wikimedia Commons)
ZEDLINES, MONDAY MARCH 30 2026, 9AM
Your 9AM Zedlines with Sarah, Niamh & Miko. (Image via Ben Pennings)
ZEDLINES, FRIDAY 27TH MARCH 2026 11AM
Your 11AM Zedlines with Charlie and Yuchen (Image via Wikimedia Commons)
ZEDLINES, FRIDAY 27TH MARCH 2026 10AM
Your (messy) 10AM Zedlines with Asha, Ava and Dan (Images via Wikimedia Commons)
ZEDLINE, FRIDAY 27TH MARCH 2026 9AM
Your 9AM Zedlines with Charlie and Yuchen (Image via Public Domain Pictures)
ZEDLINES, FRIDAY 27TH MARCH 2026 8AM
Your 8AM Zedlines with Asha, Ava and Dan (Image via Wikimedia Commons)
ZEDLINES, THURSDAY 26 MARCH 2026, 11AM
Your 11AM Zedlines with HG, Stella, Sarah, and Eden
ZEDLINES, THURSDAY 26 MARCH 2026, 10AM
Your 10AM Zedlines with Alec, Sarah, Vivek, and Eden
ZEDLINES, THURSDAY MARCH 26TH 2026, 9AM
Your 9am Zedlines with Em, Vivek and Stella.
ZEDLINES, THURSDAY MARCH 26TH 2026, 8AM
Your 8am Zedlines with Vivek, Em and Alec
ZEDLINES, WEDNESDAY 25 MARCH 2026, 11AM
Your 11AM Zedlines with Hailey and Georgie
ZEDLINES,WEDNESDAY 25 MARCH 2025, 10AM
Your 10AM Zedlines with Cass and Lachlan
Image credit: Vera Kratochvil
ZEDLINES, WEDNESDAY 25 MARCH 2025, 9AM
Your 9AM Zedlines with Cass and Hailey
ZEDLINES, WEDNESDAY 25 MARCH 2025, 8AM
Your 8AM Zedlines with Lachlan and Georgie.
Image Credit: Foran Lawn & Yard.
ZEDLINES, TUESDAY 24 MARCH 2025, 11AM
Your 11AM Zedlines with Livinia and Clementine
ZEDLINES, TUESDAY 24 MARCH 2026, 10AM
Your 10AM Zedlines with Livinia and Clementine