In Victoria, there's a push to charge a fee to view the iconic Twelve Apostles on the Great Ocean Road. Around the country, some of our national parks are free, but you pay to visit the most popular, like Kakadu. Nearly all of our beaches are free... but you'll get often slugged for parking. So, what's reasonable when it comes to charging access to Australia's great natural wonders? Liz Price is General manager of Great Ocean Road Regional Tourism and Professor Sarah Gardiner is Director of the Griffith Institute for Tourism.

Keeping up with the best, most up-to-date nutrition information that's backed by science isn't always easy. Just recently, a study that spruiked the benefits of apple cider vinegar for weight loss was retracted. But is the genie already out of the bottle? How hard is it to unpick scientific research that people have already been told is good, when it in fact goes bad? Simone Pettrigrew is Director of Health promotion at George Institute for Global Health.

ABC Radio National has launched its Top 100 Books of the 21st Century. Over the next few weeks, you can vote for the books that you believe belong on the list. We're asking some notable readers to tell me about the book that changed their life, and sat down with host of The Assembly Leigh Sales.

Tesla's latest software upgrade has arrived on our shores. A software update just dropped... and it upgrades your car, to take a ton of driving tasks off your hands. But experts say driverless technology can be fraught with issues. Hussein Dia is Professor of Future Urban Mobility at Swinburne University of Technology.