Commercial and military interest in space is growing exponentially. More and more countries and companies are keen to make money from space-related activities. They are also keen to protect their interests. There are internationally agreed rules regulating activity in space, but there’s also conjecture and confusion about how and when they should be applied. In this episode we look at efforts to better map what is, and is not, permissible in the world above our sky.

Australia has long been at the forefront of wave-energy development, but the industry has struggled to find its place in the world of renewables. Can it ever hope to compete with solar Also, Cambridge University’s Erwin Reisner on global efforts to replicate the energy producing power of plants.

Imagine greenhouses that produce food using just sunshine and sea-water. In Australia and Africa they’re already a reality. We talk to one of the pioneers of the concept. Also, the latest research on the so-called “insect apocalypse”. And, the new aviation prize open to any enterprising spirit able to cross the Atlantic in a plane powered entirely by renewable energy.

Human civilization has a waste problem, and it’s likely to get worse as population levels grow and a consumerist mentality becomes the global norm. But there are many clever, practical ways to deal with waste, including bioremediation - a nature-inspired approach.

Around the world a growing number of people are choosing cryonics. They opt to be frozen when they die on the speculative hope that one day advancing science will allow them to be ‘reanimated’ and brought back to life. The rising popularity of this new death ritual has led to the creation of a cryonics facility in regional Australia, and a handful of Australians have already signed up. Currently there is no existing science to prove that it will work, but even as an idea cryonics raises some important philosophical questions about life, death, and the human condition.