7:12 How hot is the sun? 

In breaking news, the sun is hot. But they way it is hot has confused scientists for decades. Bryan speaks to Dr Jonathan Squire of the Department of Physics at The University of Otago who has teamed up with colleagues from Princeton and Oxford and solved a key part of one of the greatest unanswered questions in astrophysics - why the Sun's atmosphere is hotter than its surface? 

This NASA image obtained June 27, 2015 shows The sun as it emitted a mid-level solar flare, an M7.9-class, peaking at 4:16 a.m. EDT on June 25, 2015.

This NASA image obtained June 27, 2015 shows The sun as it emitted a mid-level solar flare, an M7.9-class, peaking at 4:16 a.m. EDT on June 25, 2015. Photo: AFP

7:35 NZ hip hop history 

Our cultural correspondent Brad Warrington continues our journey though Hip Hop in Aotearoa. Tonight he's looking at the music of the mid 00s and some big release from Christchurch in the first decade of the 21st century. 

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Photo: Brad Warrington

8:15 Pacific Waves

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Koroi Hawkins presents a daily current affairs programme that delves deeper into the major stories of the week, through a Pacific lens, and shines a light on issues affecting Pacific people wherever they are in the world.

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Photo: RNZ Pacific

8:30 Science in Action: polar temperature spikes 

Unseasonably high temperatures have been recorded in both polar regions. A Glaciologist discusses why they might be occurring now. New treatments for Ebola, possible drugs which work not just on Ebola but also a range of related Viruses. And how computer modelling of the mutations of Sars Cov -2 suggest some good news - that the virus might not be able to mutate into further dangerous forms - at least not with its current set of genetic tools.

Icebergs. Moving Ice Floes and Ice Sheets in the calm Antarctic Sea, Reflection of Antarctica Mountain in water surface.

Photo: 123RF

9:10 Peaks and troughs in world sport 

Helene Elliot from the LA times is our sportscaster this evening. She joins Bryan to discuss events in world sport over the last week. 

Ashleigh Barty , Australia.

Photo: PHOTOSPORT

9:30 Hair & Loathing Episode 2 

the second episode from Hair and Loathing. This time, Charlotte Cook gets down to the nitty gritty on the 'uncomfortable' issue of what happens when things get intimate. 

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Photo: RNZ

10:17 Lately

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Photo: RNZ

Lately with Karyn Hay is a late night radio show on RNZ National, with an eye on live events, an ear for music, a great sense of humour and a genuine interest in people and their stories.

11:07 Nashville Babylon

Every week on Nashville Babylon Mark Rogers presents the very best in alt.country, Americana, Soul. Blues, Folk and Reggae. On this week's show Mark has birthday tunes for Aretha Franklin, classic country from Don Williams, reggae courtesy of Gregory Isaacs, plus new music from Calexico and Dean Owens.

Aretha Franklin performs at the world premiere of "Clive Davis: The Soundtrack of Our Lives" during the 2017 Tribeca Film Festival.

Aretha Franklin performs at the world premiere of "Clive Davis: The Soundtrack of Our Lives" during the 2017 Tribeca Film Festival. Photo: Charles Sykes/Invision/AP