This week, Aarthi Vijayakumar talks about living in the moment and how there is no such thing as a bad choice or decision.  She was part of a team that conducted one of the most sophisticated molecular biology experiments ever carried out in space, yet she takes it all in her stride, at the age of 20.  She is smart, wise and chilled about her future - she knows the world is her oyster because she world hard and wants to do good in the world through her talent for STEM subjects..