The all-famous Murdoch clan is engaged in a fierce battle over control of the family’s media companies. Our correspondent explains why turmoil at the top has not deterred investors. After decades of fruitless research into Alzheimer’s, there are finally some new drugs in the pipeline. And pop songs are getting shorter. Listen to what matters most, from global politics and business to science and technology—Subscribe to Economist Podcasts+For more information about how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account.