In the concluding chapter, airing on Thursday 13 April at 9.00pm on BBC One, of this 1000km scientific expedition aboard the Alucia, Liz Bonnin and a team of scientific experts journey south to visit the oldest islands in the Galapagos, to see first-hand the impact that humans have had on this pristine wilderness.
Back on the larger island of Isabela, where her journey first began, Liz descends into a spectacular vertical lava cave. Deep inside, she discovers how this hidden world might even provide an answer to how it might be possible to inhabit other planets.
On her last land-based stop on Santa Cruz, Liz comes face to face with the effects of man when she explores the magical misty Scalesia forests and meets scientists that are tracking the invasive species spreading throughout the islands. It’s here that she also checks in on a giant tortoise population, whose ancient migration pathways have come under threat from the largest human population on the archipelago, and meets a man on a mission to protect this iconic creature.
Finally, Liz dives into the deep blue waters to witness the birth of a brand new island: this is how it all began. Coming full circle, Liz and the team are able to reflect on the importance of their missions, which will help to protect the Galapagos and its extraordinary wildlife in the future. In an ever-changing world, what we learn now from these incredible living natural wonders and what we can pass on to future generations has never been more important.
Pictured are Christian Onivero from the Marine Turtle Programme bringing in a Green Sea Turtle for health checks
Galapagos Episode 3 (of 3) airs on Thursday 13 April 2017 from 9.00pm-10.00pm on BBC One.