Phil Gunson, analyst with International Crisis Group, on the reaction of Venezuala's opposition to Trump's attacks on Maduro. Dr Beatriz Grinsztejn, President of the International AIDS Society on the progess of the fight against AIDS.Science communicator and author, Dr Kathryn Harkup on the real life science behind Mary Shelley's Frankenstein.Celebrated experimental performance artist, Stelarc, on the year that inspired him to explore the human body as an art experiment.