Dr Lauren and Dr Krystal join Dr Shane in the studio, they're also joined by Dr Katherine.Professor Sharon Lewin, Melburnian of the year 2014 - on the line from Mexico discussing HIV prevention and treatment.In news, scientific tours of Fukishima - studying the uranium in the core; controversial Nobel prize winner James Watson sells his Nobel prize; prehistoric engraving dated at 500,000 years; still an alarmingly high number of infants sleeping in high SIDS risk environments; and fungus.