Hayman

I left school because of mental health problems and so didn't even get to sit my highers. In addition, I allowed students (and most worryingly, teachers) to convince me that I wasn't smart enough for science and should do 'something more practical'. I washed cars, became a travel agent and eventually went to night classes 4 years later when I had recovered, where I did human biology/chemistry (got two As and felt good to give them all the finger). That got me into a college doing biomedical sciences (with a guaranteed place in third year at my current university), at which I got top results all the way through and an A in my graded unit both years. Now I'm in third year and very excited for my future in academia. I'm also doing higher english this year as a distance learning course because writing is such a vital skill. Do not give up. Ever.

Aside from physics, the deeper you go into any scientific discipline, you will run into more and more of these examples. Theories change and develop all of the time in science, or something entirely new comes along, and it can really mess up classification systems. That is the wonderful thing about science (one of many obviously), its never finished.