A native species is taking over a jewel-in-the crown marine reserve. But what can be done?

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• Listen to the Voice of Tangaroa podcast, focusing on marine issues around New Zealand. Kina-nomics asks if we can eat our way out of the kina barren problem.
• For more about rock wall communities, dive into the murky depths of Fiordland, to learn about the sponges, sea squirts and black corals clinging to the undersea cliffs.
• Kelp is an important part of the underwater ecosystem, habitat and food for many organisms. Here how a team in Wellington are trying to restore lost kelp beds there.

Guests:

• Dr Nick Shears, University of Auckland, Rocky Reef Lab Instagram
• Dr Arie Spyksma, University of Auckland
• Dr Celine Balemi, University of Auckland
• Dr Sarah Meadows, Department of Conservation
• Dr Monique Ladds, Department of Conservation
• Sandra Hawken, Te Whānau a Rangiwhakaahu

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

New Zealand is third in the world for the number of orbital rocket launches from our shores, sitting just behind the US and China. Phil Vine discovers some of the challenges raised by our push into the unknown and how it is changing the final frontier.

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• Through a science experiment on the ISS, New Zealand researchers have been taking advantage of the unique conditions in low earth orbit to investigate commercial opportunities.
• While New Zealand is well known as a place from which to launch rockets, we do not have a lot of our own hardware in space (the University of Auckland does have TPA-1 CubeSat). But that might be about to change.
• Tech bros turned space bros like Elon Musk are making big waves out in orbit. The latest news is that Musk is hoping to harness the sun through satellites to power AI data centres.
• The New Zealand government's biggest investment in an international space mission ended in failure last year after MethaneSAT, a satellite built to detect methane emissions around the world, lost contact.
• While there are challenges inherent in humans and their technology being in space, that’s not all that is going on. Scientists are keeping a close eye on an active black hole and bright lights have Northland locals turning their eyes to the skies.

Guests:

• Mark Rocket, CEO Kea Aerospace
• Dr Priyanka Dhopade, senior lecturer in mechanical and mechatronics engineering, University of Auckland
• Dr Tuana Yazici, space law expert

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

We know there are issues with sustainability within the fashion industry - can science help create a better future? Claire Concannon visits the Bioeconomy Science Institute in Rotorua to learn how New Zealand scientists are contributing to a massive multi-national project aimed at shaping the textile industry of tomorrow.

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• UPWEARS has their own research project page if you want to learn more.
• Learn more about how the Bioeconomy Science Institute (formally Scion) is figuring out how to make new materials and products using bio-waste products rather than fossil fuels.
• The rise of synthetic fibres impacted the wool industry here in New Zealand, although some entrepreneurs and weavers are making it work for them.

Guests:

• Dr Yi Chen, Bioeconomy Science Institute, and UPWEARS
• Dr Robert Abbel, Bioeconomy Science Institute, and UPWEARS
• Sean Taylor, Bioeconomy Science Institute, and UPWEARS
• Louise Le Gall, Bioeconomy Science Institute, and UPWEARS
• Dr Kate Parker, Bioeconomy Science Institute, and UPWEARS

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

Since 2018 there's been a massive effort underway to clear over 110,000 hectares of South Westland of possums, rats and stoats. As the pest numbers have dropped the native flora and fauna seem to have flourished. The eradication stage is now nearing completion, and the focus is switching to maintenance. What will it take to keep the pests out long-term? And what can be learned from this large-scale project that could be used elsewhere in Aotearoa?

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• Read/Listen to the rest of the reports from Tess Brunton’s reporting trip to the West Coast, about the eradication project, the work of species dogs, the feedback from tour operators and how rowi, New Zealand’s rarest kiwi, has been helped come back from the brink.
• For more on the use of AI in pest management project, listen to how the Southern Lakes Sanctuary team have been making use of it at Wye Creek.

Guests:

• Chad Cottle, Predator Free South Westland
• Ethan Perry, Predator Free South Westland
• Nate St Hill, Predator Free South Westland
• Pouri Rakete-Stones, Predator Free South Westland
• Dion Arnold, White Heron Sanctuary Tours

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

Some insects communicate using a secret language that we can’t sense – a language of vibrations. Now researchers at the Bioeconomy Science Institute are starting to decode what insects are saying to each other. They hope to harness this knowledge to develop new, chemical-free methods of pest control to help farmers and growers.

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• Insects can also be recruited to help. For example, insects can be released into New Zealand for biocontrol in the effort to combat invasive weeds.
• While we often talk about the impact of invasive mammals on New Zealand’s bird life, they are also a problem for native insects too.
• We’ve got some invasive pest spiders here too, but researchers are trying to figure out if they can trap them by developing a special spider perfume.

Guests:

• Dr Mark MacDougall, Bioeconomy Science Institute
• Dr Lloyd Stringer, Bioeconomy Science Institute
• Pete Mundy, Castle Rock Orchards
• Dr Rachael Horner, Bioeconomy Science Institute
• Dr Bethan Shaw, Bioeconomy Science Institute

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

When do humans begin to interact with the world, and develop our sense of self? When we are born? Or might it start even earlier than that? Our visual systems are a key way that we perceive the world. New findings from the University of Waikato have shown that light can enter the womb and that we might already be learning about the world before we arrive in it.

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• Listen to Our musical minds to learn why, to psychologists, humans’ musical ability is just weird.
• Like our sense of vision, our ability to hear also involves physical inputs from the world around us combined with the processing and prior knowledge of our brains. But sometimes things can go a bit awry, such as happens for those with tinnitus.
• Our visual system is evolved for daylight, but what about those creatures that live in the deep darkness, such as squid.
• Professor Vincent Reid’s early research in this area was covered by RNZ podcast ‘This Way Up’ in 2017.
• Hear more from William Ray in the award-winning Black Sheep podcast series, or in a recent Our Changing World episode about the Flowers of the Underworld.

Guests:

• Professor Vincent Reid, University of Waikato
• Associate Professor Jacob Heerikhuisen, University of Waikato
• William Ray, Janella Espinas, James Espinas Ray

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

A Southland company is growing red seaweed as a supplement that’s been shown to significantly reduce methane emissions in beef and dairy cattle. In our last summer science series episode, Cosmo Kentish-Barnes of the Country Life team heads to Bluff to learn more.

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• You can read Cosmo Kentish-Barnes' story about this topic, Red seaweed cuts methane emissions from cattle, scientists say.
• Cosmo signed off from the Country Life team earlier this year, after 17 years as the show's South Island producer. You can listen to his final episode.
• There are also pāua and whitebait farms operating out of the Ocean Beach Aquaculture Hub in Bluff. Kate Evans visited both ventures in a 2024 episode of Voice of Tangaroa, Fish out of water.

Guest:

• Brent Jackson, production scientist

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

Why do we spend more than we need to? Is it mood, FOMO, the desire to impress? Or maybe some tricky behavioural triggers we're not even aware of? Our summer science series continues with an episode of the RNZ podcast Thrift, in which Katy Gosset gets to the heart of the matter with a consumer behaviourist, and shares some tips to stop us spending.

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• You can read about the psychology of spending in RNZ's story: Why do we spend more than we need to?
• Thrift is an upbeat podcast that offers wise ways to beat the cost of living crisis and get the best from your money. Listen to more episodes of Thrift.

Guest:

• Ekant Veer, consumer behaviourist

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

We’d all like to know how to live long healthy lives, and Kim Hill is no different. In this episode of Kim Hill Wants To Know, she talks to geneticist Dame Linda Partridge about the scientific breakthroughs that could mean the end to aging as we know it.

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• In 2023, Our Changing World spoke to researchers about what happens to our muscles as we grow and age.
• Kim Hill Wants To Know sees Kim back asking questions in her inimitable style. She has conversations with guests from around the world about topics that spark her interest and will do the same for you. Listen to more episodes of Kim Hill Wants To Know.

Guest:

• Dame Linda Partridge, geneticist

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

We all love a good crunchy apple – but how do they stay like that for months after being picked? The Our Changing World summer science series continues with an episode of Here Now. Kadambari Raghukumar travels to Hawke's Bay to find out from South African-born scientist Nicolette Neiman. For plant physiologists like Nicolette, the thrill is in finding ways to make that possible – delivering a crunchy fruit fix to the world almost any time of the year.

Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.

Learn more:

• Read Kadambari Raghukumar's article, How do New Zealand apples stay crisp from tree to table?
• Here Now is an RNZ podcast about the journeys people make to New Zealand, their identities and perspectives, all of which shape their life here. Listen to more episodes of Here Now.

Guest

• Nicolette Neiman, plant physiologist

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