Canola, cropping and Chappell Roan: here's what it's like on the back of a harvester during harvest season. 

And Trump reckons he can end the war in Ukraine in 24 hours.

Plus, could LEDs put a stop to shark attacks on surfers? 

Guests:

• Dr Jessica Genauer, senior lecturer in international relations, Flinders University
• Dr Laura Ryan, research fellow in comparative neurobiology, Macquarie University
• Nick McKenna, agronomist