Main content
Why do dirt roads become rippled over time?
Alice Williamson, lecturer at the University of Sydney, explains to presenter Marnie Chesterton why roads made of loose sand or gravel develop regular bumps.
(Image: Dirt road in Namibia Credit: Getty Images)
Duration:
This clip is from
More clips from Sydney Science Festival, Australia
-
![]()
Winning space photos
Duration: 02:39
-
![]()
Australia's first human body farm
Duration: 02:15
-
![]()
Why do fingers wrinkle when swimming or in the bath?
Duration: 01:00
More clips from CrowdScience
-
![]()
What would happen if we fell straight through the earth?
Duration: 02:34
-
![]()
Why is aurora green?
Duration: 02:19
-
![]()
In a random universe, is anything predictable?
Duration: 01:58
-
![]()
How do birds survive so high up?
Duration: 02:13
