Australian Broadcasting Corporation

Tasmania is a world lost in time, an isolated pocket of Gondwanan-era forests and Jurassic mountains sheltering animals that live nowhere else on the planet. Aaron Pedersen tells us that even in its isolation, the island is under threat.

Lily Serna explores the strange world of sensory perception, using magic and illusions to reveal the difference between how we perceive the world, and reality. She discovers that we can all predict the future and be tricked by the brain into believing things that aren't real. But despite the occasional glitch in our perception, we're able to navigate life effortlessly. And now artificial intelligence is racing to match how we see the world.

Humans have pondered our origins for 50,000 years. In seeking evidence, Scientists discovered that the essence of all life is in it's chemistry - a four billion year odyssey from the very first cells to the development of complex life and the remarkable discovery that our first common ancestor is a lot older than we ever imagined.

Chinese President Xi Jinping understands the greatest threat to the authoritarian state is not an invading army but the free minds of its people. This episode explores the fight for freedom of thought in China.