Dr Lauren, Dr Ray and Dr Jen join Dr Shane in the studio. In news - how we measure time needs fine-tuning via atomic clocks; artificial photosynthesis; Epigenetics can identify differences in DNA for identical twins; Chinese scientists have been looked at modifying the human embryo to prevent a fatal blood disease.Euan Ritchie joins the team to discuss the state of science in Australia, including government spending on research and development.Vaccinations is back in the news after the Australian Vaccination Sceptics Network released a controversial (and offensive) advertisement. Australia has a terrible record for species that have gone extinct since Europeans arrived.Finally, the Big Roo Count, the Pozible campaign to get Dr Jen and Euan back north to assess kangaroo species. Check out the campaign and dig deep to support their cause here www.pozible.com/project/195117.