Out of all of New Zealand’s natural hazards, landslides have resulted in the greatest loss of life since written records began. Pulling in data from decades of landslide research, a team at Earth Sciences New Zealand are now developing national models of landslide risk for both slow- and fast-moving landslides, to help New Zealand plan for, and respond to, major landslide events.

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• Other researchers at Earth Sciences New Zealand are also investigating underwater landslides, which have the potential to cause tsunami hazards.
• In January In-Depth reporter Kirsty Johnston investigated the gap between what New Zealand spends on disaster recovery and climate preparation.
• Jesse Mulligan revisited the Abbotsford disaster in 2019 with Sarah Johnston from Ngā Taonga Sound & Vision.
• Landslides are one of the threats that are monitored 24/7 by the National Geohazard Monitoring Centre.

Guests:

Dr Chris Massey, Dr Saskia deVilder, Dr Sam McColl, Earth Sciences New Zealand.

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Every 90 minutes a New Zealander dies from heart disease. Liz Garton meets the team at the Institute of Biomedical Technologies is developing new products to help monitor heart health in the home to try to change those terrible statistics.

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Learn more:

• The Detail recently looked into the deadly heart disease that creeps up on you.
• In March, Guyon Espiner spoke with Dr Philip Shirely about how an annual flu vaccine can reduce the risk of heart issues.
• Kate Green’s investigation into health insurance in May, showed heart disease is one of the biggest drivers of claims.
• Dr Claire Concannon visited the CoRE Pūtahi Manawa to find out what they’re doing to address heart health inequities, in 2022.

Guests:

Professor Andrew Lowe, Dr Tet Chuan Lee, Matin Khalili, Institute of Biomedical Technologies, Auckland University of Technology.

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Join a group of young explorers as they journey to Antarctica to return a copy of The Count of Monte Cristo to Discovery Hut. Along the way they visit other historic huts to learn about triumphs and tragedies of the 'Heroic Age of Antarctic Exploration'. This is an edit of the Antarctic Heritage Trust's '77 Degrees South' podcast.

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Learn more:

• The full Antarctic Heritage Trust 77 Degrees South podcast can be found on their website.
• The AHT also previously made a podcast about restoring Scott's Terra Nova Hut, and an edit of that was also aired on Our Changing World.

Guests:

Producer: Maia Ingoe

Narrator: Jake Bailey

Sound design and music: Calum Turner

Inspiring explorers: Kitiona Pelasio, Louise Piggin, Lucy Hayes-Stevenson, Ngaiwai Clendon, Daniel Bornstein

Guest contributor: Al Fastier

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To get electric passenger planes in the skies requires powerful electric motors, but they must also be small and light. Some kiwi scientists think they could have a solution. Claire Concannon heads to a warehouse in Petone to learn about the promise of high temperature superconducting magnets to make electric motors for airplanes.

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In this episode:

01:00 Electric planes and the challenge of aviation electrification.

02:48 The history of the Robinson Research Institute and useful properties of superconductors.

07:00 The establishment of the New Zealand Institute of Advanced Technology

08:30 The advantage of superconducting motors for aviation.

11:15 Airbus’ plans for a future electric plane

12:05 Warehouse tour and levitation bearings for future motors

14:04 Basic motor design and characterising AC losses in superconductors.

21:26 Testing a superconducting generator with Air New Zealand…

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A team that developed a brain cooling treatment for oxygen-deprived babies, a young scientist who created a helpful backseat driver app, a Māori kaiako encouraging her students to weave traditional design and contemporary materials, a paleobiologist communicating about the issues around de-extinction and a researcher investigating how much climate change contributes to extreme weather events: We meet the 2025 Prime Minister's Science Prize winners!

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New Zealand is a land formed by volcanoes, including some still active. Claire Concannon meets a researcher analysing ash deposits to determine if a future eruption might have dangerous levels of hazardous chemicals. Plus, she learns about a voyage to Vanuatu and the Solomen Islands to study the gases and ash of an active volcanic chain there.

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• Researchers continue to study New Zealand’s active volcanoes like Whakaari and Ruapehu to try to understand their patterns of eruptions.
• When Hunga Tonga Hunga Ha‘apai, just north of Tonga’s main island, erupted in 2022 it caused a worldwide tsunami. Ellen Rykers dug into the science behind the phenomenon.
• The work of the National Geohazard Monitoring Centre is to keep on eye on earthquake, volcano, landslide and tsunami hazards 24 hours a day, 7 days a week.
• Auckland is built on a network of volcanoes, and underground lava caves.

Guests:

• Dr Jenni Hopkins, Victoria University of Wellington
• Dr Ian Schipper, Volcano Waka Lab

Go to this episode on rnz.co.nz for more details

Phase two of Predator Free Wellington’s groundbreaking project to rid our capital of rats is well underway. They’ve learned a lot from their work on the Miramar Peninsula, but with this new chapter comes new challenges – not just backyards, but a hospital, and even a zoo! Charlie Dreaver meets some of the team out fighting this battle on multiple interesting fronts.

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Learn more:

• The target for Wellington to become New Zealand’s first predator-free city was announced by Conservation Minister Tama Potaka in March, as part of a Predator Free 2050 strategy update.
• In November last year the government added feral cats to the Predator Free 2050 list of targeted predators, likely in response to RNZ’s In-Depth team’s reporting about the destruction they cause, and a pre-election promise.
• Learn more about other large predator removal projects such as Predator Free Rakiura and Predator Free South Westland, and the plan to make Auckland Island predator free.

Guests:

• Zara Koorey, Predator Free Wellington
• James Wilcocks, Predator Free Wellington
• Chirs Jerram, Te Nukuao Wellington Zoo
• Sally Bain, Predator Free Wellington

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Scientists had long been exploring RNA technology as a way to make vaccines before it had it’s breakout appearance during the Covid-19 pandemic. Since then, interest in the potential uses of RNA to make vaccines and disease treatments has bloomed. In late 2023 a government-funded platform began work to enhance New Zealand’s capacity to design and make RNA. Three years in, how is the platform going?

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Learn more:

• RNA interference (RNAi) technology is being investigated to help honey bees fight off the varroa mite.
• US based Dyne Therapeutics conducted a clinical trial study of their RNA-based therapeutic for myotonic dystrophy in New Zealand.
• Our Changing World covered how the new RNA vaccine tech works in 2021.
• Dr Lisa Connor spoke to RNZ’s health reporter Ruth Hill last August after the US made funding cuts to their RNA vaccine research.

Guests:

• Dr Lisa Connor, Malaghan Institute of Medical Research
• Dr Rebecca McKenzie, Malaghan Institute of Medical Research

Go to this episode on rnz.co.nz for more details