Europe swelters in 'heat dome', and Martin Rees on aliens

Coming up, most of Europe smashes June temperature records. But what is the 'heat dome' that's driving this extreme weather? Plus, why HPV vaccine rates are declining despite a huge reduction in cervical cancer deaths; Sonia Shah on her book The Fever: How Malaria Has Ruled Humankind for 500,000 Years; and former Astronomer Royal, Lord Martin Rees, on aliens. Like this podcast? Please help us by supporting the Naked Scientists (thenakedscientists.com/donate)