Responding to a huge volume of your questions on borders, refugees and migration, Geraldine Brooks, Tom Elliott, Voranai Vanijaka and host Mark Colvin search for insight and progress on this charged and crucial subject – taking a pragmatic and personal perspective to the problem.

Given its destructive and totalitarian potential, is it blind and foolish to defend the internet – or does idealism provide a corrective vision? What gives this incredible technological structure its potency? What does the internet offer in terms of political freedom and social mobility, privacy and big data, and broadcasting and publishing and political change – and what does it cost us? Blogger, science fiction author, Electronic Frontier Foundation special advisor and Boing Boing...

Raimond Gaita, Anne Summers, Gregory Phillips and Alan Duffy come together to seek out and dissect practical questions of ethics: are there basic values or ideas of goodness or fairness that we can all share? What, specifically, are they? What even is ‘ethical’, should we strive for it – and can there be a middle ground? Hosted by Mark Colvin.

How do we distinguish our ideals from the real world? Is mainstream Australian – whatever that means – capable of living up to its own myths? Let’s not let subcultures off the hook, either. What draws our meanest impulses out of hiding? When do we laugh about our differences … and when do they come to define us? With artist Abdul Abdullah, writer and comedian Nakkiah Lui, Aboriginal health expert Gregory Phillips, journalist and political commentator Voranai Vanijaka and Gaysia author...

In a thoughtful discussion to address our very large – and more nuanced – human dilemmas, Raimond Gaita, Jane Caro, Benjamin Law, Kristin Alford and Sammy J interrogate our search for meaning and contentment within our own circumstances (including gender, cultural background, upbringing and socio-economic position). Why happiness rather than contentment? Why does a part of us want to destroy what we love? Are we born happy, spending our lives defending that, or are we born neutral – destined...

As part of The Interrobang, Cheryl Strayed – author of Wild and Tiny Beautiful Things – shares a story of her children leaping, literally, into the unknown.

As part of The Interrobang, Mary Norris unpicks the complex relationship between words and actions. If actions give birth to words, and words may inspire actions, does it really come down to deciding between the figurative chicken or the egg?

Food columnist, cookbook author, MasterChef Australia-winning chef and Destination Flavour presenter Adam Liaw talks food trends, creativity and interpretation in this 15 minute snap lecture.

Scientists have told us how the world began, but how do they think it will end? Explore pre-human mass extinctions (and how close it came to ‘the end’) – and why our thoughts often drift toward apocalyptic predictions and end time fears – with a half hour talk from molecular biologist and science communicator Upulie Divisekera.

A conversation with 'comma queen' Mary Norris, The New Yorker's copy editor and grammar guru.

Discuss the complexities of gender and power with the formidable critical faculties of Meghan Daum, Jane Caro, Geraldine Brooks, Nakkiah Lui and Sally Warhaft.

Where are we headed – and what will the journey be like? How do we deal with rapid change, how can we make more deliberate decisions – and how do we ensure we’re even included in that process? In this session, Cory Doctorow, Adam Liaw, Kristin Alford and Maggie Ryan Sandford explore the changing technologies, social dynamics and global circumstances behind what’s coming next.