Hope for those with Huntington's

Robin McKie, the Observer’s science and environment editor, discusses an innovative drug that may soon offer ways to fight Huntington’s disease, while Mark Newnham describes being diagnosed with the inherited condition. Plus: Peter Beaumont describes his trip to the Costa Rican cloud forest, at threat from climate change. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>