When we've spent 95% of our evolutionary past living in small tribal groups, what's prepared us to live and work in vast metropolises with millions of others?

As Australia’s population expands wild places shrink. To protect the remaining patches we want to lock it up and keep people out. But what exactly is wilderness? Is it a place untouched by human hands? An indigenous geographer says that what we call wilderness is not nature left to its own devices but the result of thousands of years of indigenous landcare.

We are aware of the impact racism can have on black, Indigenous, and other racialized people. We condemn white supremacy and hate crimes. But what if the most harm to people of colour is caused by white 'progressives'? What if they are the problem, but they are in denial?

How do you feel about insects? You might love bees because they pollinate food crops but not be a fan of mosquitos or the aphids munching their way through your garden. Love them or hate them insects are a vital part of the ecosystem. They outnumber us on the planet by twenty million to one and they feed an army of animals. How can we protect them from habitat loss, climate change and pesticides?

Why are human societies unique among animals for their ability to accumulate knowledge and technologies? Most of us invent nothing, so how have we achieved this while no other species has?

Satellites orbiting the earth are put to many uses helping us to navigate, predict the weather and connect to the internet. Not to mention spying on other countries. But it’s getting crowded up there with more rockets , satellites and pieces of space junk and no-one is directing traffic. So who decides the future of space?

The legal system is far from perfect. How can laws be used, or reformed, to help bring about social change? Can they assist indigenous Australians to protect their cultural and intellectual property, or deliver justice to survivors of sexual violence? What are the limits of class action litigation in contributing to a better future for young Australians about to bear the full brunt of climate change? Three lawyers talk about the power, potential, and limits of the law.

After the moon, Mars is the next big thing . So what do we know about Mars and who’s likely to get there first? Spacecraft flying through the atmosphere collect data on Mars chemistry and geography while rovers on the Martian surface act as forward scouts for a human mission. Then there's the tantalizing hope we'll find life.

All animals communicate, but only humans have language. Why only us? Why has language been more important to human success than have our genes?

Make the most of your life and be at peace with death. Easy to say but hard to do. Death is not a topic we’re encouraged to talk about but its shadow shapes many of the things we do. Can you have a happier life if you let go of death anxiety?