Deforestation, industrialization and climate change are constantly listed as the main causes of the increasing list of endangered species. However, the impacts of human activities in biodiversity can be traced back to the 1500s. Rats and mice were common passengers of many boats during the exploration era and found their route to thousands of islands worldwide. Today, invasive rodents are present in 80% of the world’s islands, putting other species at great risk. It is estimated that 75% of extinctions have happened on islands and mice and rats are the primary cause of it, according to Karen Poiani, CEO of Island Conservation.