ok! long time no brain torture. i m going to keep updating this thread often so no more separate threads. first one. the question has definite scientific reasoning (a big clue) so tech freaks can try i m reducing the question length. a person decides to fly around, he is from UK (we know someone is ) he takes off in northern direction drives 500 km, then 500 km eastwards after turning, turns again drives 500 km southwards , finally turns westward and drives in that direction for another ..yeah right 500km. does he reach the same point he started at? of course he does not can anyone dare explain why and how? i wud also like this thread to be borrowed/hijacked if someone wishes so.