Navigation for Nights

7:15 Easter Island obsidian

Analysis of obsidian artefacts now challenge the generally accepted idea that civilisation on Easter Island collapsed due to self-induced environmental degradation – with anthropologist Prof Thegn Ladefoged from the University of Auckland.

Gallery: Easter Island obsidian

8:10 Windows on the World

International public radio documentaries - visit the Windows on the World web page to find links to these documentaries.

8:40 Toxicology

What's your poison? Toxicologist Dr Leo Schep tests for substances taken internally or applied externally that are injurious to health or dangerous to life and looks at the history of synthetic cannabinoids.

9:10 Spiritual Song

Publisher John Thornley on the magazine Music in the Air, which explores song and spirituality, from the church to the pop charts.

9:30 Insight

10:00 Late Edition

A review of the news from Morning Report, Nine to Noon, Afternoons and Checkpoint. Also hear the latest news from around the Pacific on Radio New Zealand International's Dateline Pacific.

11:06 Beale Street Caravan

David Knowles introduces the Memphis-based radio show with an international reputation for its location recordings of blues musicians live in concert (3 of 13, BSC)