I am reading a book called "From the Flight Deck," by Doug Morris who is an Air Canada Airbus A340 pilot. The book is about plane talk and sky science. I never thought this book would be so interesting to read and learn so much about aviation and sky science. I love the book so much, I checked it out at my local library, and been re-newing it over and over to finish reading it. Some things I have learned from reading that book thus far, I never knew that you can obtain your commercial pilots license by flying in a simulator, (AND NOT IN REAL FLIGHT). Also I did not know that aircraft tires are filled with nitrogen instead of oxygen, and I did not know that "space weather" can affect polar routes over the North Pole. Space weather as in cosmic radiation that can affect an airplane and passengers through severe radiation from cosmic rays from the sun and outer atmosphere. Its a very interesting book to read, you should check it out if you havent read it yet, I definitely recommend it to people who want to know so much interesting facts about aviation science. The book is totally amazing.