Rewilding with wolves: can they help rebuild ecosystems?

After wolves were reintroduced to Yellowstone national park in
1995, researchers noticed some big ecological changes, leading to
the regeneration of the landscape. It’s an argument used to justify
the return of apex predators – but it’s increasingly being
challenged. Phoebe Weston talks to Ian Sample about whether wolves
really have the power to shape ecosystems, and what that means for
the debate about bringing them back to the UK. Help support our
independent journalism at theguardian.com/sciencepod