09:05 Stick-on window films may not live up to thermal claims

A warning to home owners about stick-on window films which promise to drastically reduce heat loss. Some claim to reduce internal heat loss in winter by up to 44 per cent, at a cost of thousands of dollars. The Building Building Research Association or BRANZ has researched window insulation films on behalf of the Energy Efficiency and Conservation Authority and found that in some instances the products might reduce heat loss through single glazing by up to 25% but it can also create problems with condensation. John Burgess from Branz will join Kathryn to talk through the research.


Condensation Photo: 123RF

09:20 Explosions from Kilauea volcano intensify

A red alert for aviation has been issued for the first time since the latest series of eruptions began 12 days ago. Ash and volcanic debris has risen more than three-and-a-half thousand metres above the volcano's crater and is drifting southwest. Wendy Stovall a volcanologist with the US Geological Survey joins Kathryn with the latest.

People play golf as an ash plume rises in the distance from the Kilauea volcano on Hawaii's Big Island.

Photo: AFP

09:30 Sir Paul Callaghan, Dancing with Atoms - Shirley Horrocks

Film-maker Shirley Horrocks, documents Sir Paul Callaghan's world of atoms and molecules. Sir Paul, who died in 2012, used nuclear magnetic resonance as a choreographer directs a dance. He saw New Zealand as 'a place where talent wants to live' and his desire was to make the mainland predator-free. In Dancing with Atoms, Shirley Horrocks interviews Sir Paul's brother Jim, colleagues, students and friends, chronicling the life of one of New Zealand's greatest scientists.

09:45 UK correspondent Matthew Parris

Matthew Parris with the latest news from the UK, including the build-up to the royal wedding.

Official photographs to mark the engagement of Prince Harry and Meghan Markle have been released by Kensington Palace.

Official photographs to mark the engagement of Prince Harry and Meghan Markle have been released by Kensington Palace. Photo: Kensington Palace / Alexi Lubomirski

10:05 40 years creating puzzles, crosswords and sudoku

Christine and James Lovatt have been creating crosswords, puzzles and sudoku for forty years.  Lovatts Puzzles is now one of the largest independent magazine publishers in Australia. Christine says she's been captivated by puzzles since she was a little girl, when she would devise them for her father. They tell Kathryn Ryan about how they built the business, and what makes a great puzzle.

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Photo: supplied

10:35 Book review - To Throw Away Unopened by Viv Albertine

Kiran Dass from Timeout bookstore reviews Viv Albertine's "To Throw Away Unopened", published by Faber.

10:45 The Reading

Malcolm and Juliet by Bernard Beckett read by Stephen Lovatt (# 4 of 15)

11:05 New tech: supermarket surveillance & Google Assistant

Sarah Putt talks to Kathryn Ryan about supermarket surveillance, Google Assistant making calls for you and Tech Week

11:25 Teens self harming: psychologist's advice for parents

Youth Wellbeing Study

Youth Wellbeing Study Photo: Supplied

Research indicates between a third and half of 12-18 year-olds have intentionally harmed themselves at least once.  Professor of Psychology at Victoria University of Wellington, Marc Wilson, is one of our country's top researchers on self-harming.  He is leader of the Youth Wellbeing Study Team, and is building a stock of resources for when a parent discovers their child is hurting themselves on purpose.

If you or someone you know has been affected by subjects talked about in this interview, one or more of these services might be able to give you, or direct you, to support:

11:45 Deadpool 2, Swagger of Thieves, The Rachel Divide

Sarah McMullan reviews Deadpool 2, Swagger of Thieves, The Rachel Divide, and 13 Reasons Why Season Two

Deadpool and Swagger of Thieves

Deadpool and Swagger of Thieves Photo: supplied