Excerpt from bbc.com
Giant tortoises are roaming the Galápagos island of Floreana for the first time in more than 180 years, in what conservationists have called a "hugely significant milestone".
The release of 158 captive-bred juvenile tortoises onto the island is part of the Floreana Ecological Restoration Project led by the Galápagos National Park Directorate.
The reintroduction follows a "back-breeding" programme launched in 2017 after scientists discovered tortoises carrying ancestry of the Floreana giant tortoise on nearby Isabela island.
Floreana's native species, Chelonoidis niger niger, was driven to extinction in the 1840s by sailors who took thousands from the island for sustenance during long voyages.