Insight - Eric Frykberg explores whether the regions can still thrive without irrigation certainty.

Each week Sunday Morning gets in touch New Zealanders living abroad. Today Chris Adams speaks to Jim Mora about what's happening in his neck of the woods in Colorado.

Commentators from all over New Zealand get the chance to have a say on what's been bothering them. Mai Chen gives her thoughts on cultural and linguistic diversity in courts.

Denmark is building a wall along the Danish-German border to stop wild boars from getting in and spreading African swine fever. Journalist Tom Carstensen explains what's happening at the border.

Early bird or night owl? Professor Timothy Grayling of the University of Exeter Medical School explains the health implications of our sleep patterns.

Throughout the week tax has been hitting the headlines with National saying their new plan would give the average worker an extra $430 a year. Economist Bernard Hickey looks at the numbers.

January 27 is both the date of Jim Mora's first Sunday morning show on Radio New Zealand and, even more importantly, National Chocolate Cake Day. Laurel Watson has spent more than a decade as a professional chef and baker, and can chart the evolution of chocolate cake from its earliest known recipe - a butter-soaked guide to an early grave printed in 1847 - to its more health-conscious modern day incarnations. Watson is a professional cupcake baker has tips for how to make the perfect chocolate cake, though she says her personal preference would be to just eat cheese on crackers.

Feeling stuck in a rut? Learning to embrace uncertainty could be a way forward, says psychotherapist and author Mel Schwartz. Many of us would like to be able to predict the future, but because the future is essentially unknowable we end up feeling fearful and anxious, Schwartz tells Jim Mora.

Ollie and Harry Ferguson are adventurers. The Scottish brothers have sent Lego men into space, forged their own bushcraft knives, mummified a fish, and slept out in the wild. Most famously they've sent a toy pirate ship halfway around the world, tracking it from the North Sea to the coast of Barbados and capturing the attention of worldwide media in the process. The boys' exploits started in 2014, when together with their parents MacNeill and Vicki Ferguson, they made a list of 500 adventures to go on by the time Ollie turned 18. Progress has been quick so far, with 279 of the list's entries already ticked off. But the going is about to get tough. The boys are planning a coast-to-coast crossing of the Scottish mainland this year. You can follow their progress via their Facebook page called The days are just packed.

Commentators from all over New Zealand get the chance to have a say on what's been bothering them throughout the week. Auckland University of Technology Professor Alan Blackman on the perils and amorality of payday loans.