Best of the Week - 9 May 2014

Highlights from Radio New Zealand National's programmes for the week ending Friday 9 May. This week......can the media take responsibility for the about turn by MPs over legal highs and should we be legalising cannabis; online retailing challenging the tax system; counting cockles to reveal the health of our ecosystems; the Vagenda blog questioning our modern contradictory views of feminism; the importance of Danish astronomer Tyco Brahe; the secret life of backing singers; where have all the butterflies gone as wasp numbers increase; kapa haka inspiring leadership and Ferran Adria the world's greatest chef on the legacy of his famous restaurant El Bulli.