Urbanisation, biodiversity loss, climate change: just some of the worldwide problems ‘rewilding’ – i.e. restoring food chains by returning ‘missing’ species to the landscape—can help tackle. Researcher Liesbeth Bakker (NIOO-KNAW) has edited a theme issue of the world’s oldest life sciences journal, Phil Trans B, on rewilding, together with a Danish expert. The issue is now available online.