1. People Magazine Investigates: Cults: Jonestown Massacre
2. Critical thinking

This is the story of the aboriginal men who served overseas in WW1. They joined up even though, at the time, they had no voting rights and didn't count as humans in any national census. A powerful and moving session.

What's good design? And why is it important? Delving into these questions is Debbie Millman - a 'brand' specialist and a podcaster on all things to do with design. Here she is in conversation with architect Stuart Harrison.

Former President of Ireland Mary McAleese is a rarity - a towering and charismatic political figure. Here she is in conversation about the Irish peace process with ABC's Annabel Crabb.

Helen Garner's latest book follows the disturbing case of Robert Farquharson. She tries to understand what she sees as a very ordinary bloke, who commits an horrific act.

With claimed muzzle velocities as high as 300km/h, potato cannons can cause some real damage. But that does not stop one man from taking a potato to the groin.

What could possibly go wrong when attempting to jump over a moving car, trying a backflip off a brick wall, or popping a wheelie on a motorbike in a crowded street? Probably more than you think.

Philip Glass is an extraordinary composer for these times; The Perfect American is his opera based on the last 3 months of Walt Disney's life.

Big Ideas presents the best public talks, debates and lectures from Australia and around the world, with a focus on arts and culture.

Tampa, a story about female paedophilia and the debut novel by Alissa Nutting. Here she is in conversation with Benjamin Law at the Melbourne Writers Festival.

See just how severely you can embarrass, injure and humiliate yourself when abseiling, running up walls and flying with a jet pack.

See just how badly you can embarrass, injure and humiliate yourself when pole vaulting, ski jumping or just rolling down a hill in a trashcan.

Philosopher Raymond Gaita speaks with Simon Longstaff, seemingly without constraint, about the "examined life and the role a philosopher might play."

This session will lift your spirits and remind you that such good journalism is still out there and this is a great bunch of women practising it. Kate McClymont, Joanne McCarthy and Colleen Ryan shine.

What can possibly go wrong when bungee jumping blindfolded, flying a kite in high winds, or hydroplaning a jet sprint boat at 120km/h? We breakdown the science of stunts gone wrong.

It is impossible to swallow a spoonful of cinnamon. But don't just take our word for it - see the hundreds of daredevils that have tried this popular Internet challenge ... and failed.

By now, we know all there is to know about Australia's history. Or do we? Here's a fascinating discussion with Henry Reynolds, Bruce Pascoe and moderator Lydia Miller about war, memorials, commemoration and agriculture!

Done right, a golf club head speed can approach 200 kilometres per hour. Done wrong, and the momentum can knock a golfer off his feet.

A group of intrepid amateurs attempting to ride a mechanical bull help to demonstrate the relationship between inertia and mass.