Biophysical and Biochemical bonds (Friendships):  On completing half-a-century of my biological existence, I was able to super-appreciate creation of life-long bonds with a few humans (and super-humans)  resulting from my academic/scientific/career directions/choices over the years. Regardless of (a) the variance in transience of interactions and (b) whether those interactions evolved through introductions via big groups or individually, some bonds are exceptionally strong. Even if we meet after several years or even decades, we are able to pick-up exactly from where we left-off! There is an unspoken understanding in spite of the "Heisenbergian Uncertainty" of life. While today's generation has the luxury to saturate their devices with photographs, my collection of tangible pictorial memories is highly limited owing to the generation to which I belong. Below are few of the pictures I could find - the obvious missing ones are from my undergraduate hostel/dorm days and my stint at Shaw Wallace & Co. Ltd. in Bombay (now Mumbai) from the last century. I feel very grateful and humbled to have these few individuals amongst billions of humans on Earth for their unconditional presence in my life.