Obama has been brought to New Zealand by the NZ-US Council to promote the relationship between the two countries which was icy for many years over New Zealand's anti-nuclear policy.
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The former cricket all-rounder had been undergoing treatment for bowel cancer.
Dr Andrew Kralicek and his colleagues at Plant and Food Research have spent the past decade developing a novel biosensor that exploits the powerful odorant receptors that insects use to smell. / KiwiNetTV