On this weeks show: an interview with the I, Science co-editor; the Imperial Late Greenovate Festival; the Purple Earth Hypothesis; and the conservation efforts paradox.

A farmer can remember what has happened last year and the year before, and can prepare accordingly. But what about plants? How can they pass on their experience to their offspring?

With Rio 2016 Olympics less than 70 days away, Marianne Guenot speaks to leading research scientists about the work being done to curb the Zika virus outbreak.