Hi, I thank you for accepting me into this physics forum. So, let me introduce my self briefly. I'm a med school student going to my 9th year of med school studies, currently resident MD in Medical Genetics in Paris. Next year I'm going to pause med school for an Engineering school ; I'm going to study microfluidics. I'm not doing physics since my first year of med school, I'm working hard to catch up before starting next year the engineering school. I'm glad being part of this forum, and look forward to discuss about physics with all of you guys. Thanks again.