Author and documentary filmmaker Bill Morris takes us back in time in his new book The Road to Gondwana - in search of the lost supercontinent.
Aotearoa New Zealand is just one fragment of this giant landmass which also included Australia, Antarctica, Papua New Guinea, South America, Africa, Arabia and India.
The book traces the steps science took to find the lost southern continent of Gondwana and its own journey through 500 million years of Earth's history.
Bill Morris says without Gondwana the planet and the trees, plants and animals we live amongst would be very different. He joins Kathryn for a deep dive into the lost continent.