Nobody knows what's behind our eyes, but by looking into them they can now make a good guess at our intelligence. According to new research from the Georgia Institute of Technology, the diameter of the pupil - the black circular aperture in the centre of each eye - is a strong indicator of cognitive ability.

Joining us again on Sunday morning is New Zealander Dr Gary McLean. He discusses the Delta variant, what type of masks we should be wearing, and why annual Covid-19 booster shots are going to be likely.

British thriller writer Adam Hamdy's new novel Red Wolves has seen the writer go deep behind the scenes in the name of research. He joins the show to discuss Red Wolves and how his own life experiences have shaped his writing.

Author Catherine Clarke's new book, The Only Living Lady Parachutist, tells the story of mysterious daredevil Lillian, an unmarried mother of two who risked her life for fame and fortune. Catherine is with us to talk about her new book.

Norman Lebrecht, the well-known UK musical critic, has recently claimed that the appointment of chief conductors has little impact on the performance of orchestras. Music Director Gemma New joins the show to offer her thoughts.

Yulia is making a comeback as she performs her own rendition of Edith Piaf's most powerful performances at the Auckland Civic Theatre on the 3rd and 4th July as a part of Auckland's 2021 live cabaret season.

Professor Anthony Klotz predicted that people who stayed put during the pandemic are now getting ready to jump ship. A recent study in New Zealand by Hays garnered similar results. Adam Shapley is with us to discuss.

It can be the most infuriating experience ever - a tune gets stuck in your head and you just can't shake it. New research suggests events like this play an important role in helping memories form. Professor Petr Janata joins us to discuss.

Joining us on the Weekend Panel are Brigitte Morten and Chris Wikaira. Among other topics, they discuss how Covid-conscious the capital is, the Dawn Raids apology, the proposed new hate speech laws, and Laurel Hubbard going to the Olympics.

A new drinking device is being heralded as an instant cure for hiccups, with 92% of 249 volunteers who tested the device experiencing instant results. Dr Rajshri Roy is a lecturer in Nutrition and Dietetics and joins us to discuss.