Part 1: Weebubbie Cave
After a quick round of golf, Anja Taylor joins a team of scientists for a spell-binding diving expedition into the Nullarbor's deepest cave.
School of the Air
Derek and Simon stage a physics and maths roadshow for School of the Air students who live on the Nullarbor.
Part 2: Weebubbie Cave
On her second dive, Anja teams up with Dr Stefan Eberhard to discover the microscopic crustacea that inhabit the cave.
Eucla Sand Hills
The team reveal the surprising origin of the sandhills using just a touch of vinegar.
