The 10 most influential sci-fi movies of all time

Science fiction has always been a genre in which you can stretch the imagination with ideas that are only possible in the mind. But there are cases where real science is needed, and can be used impressively.

Author Brian Clegg uses his new book "Ten Billion Tomorrows" to show how a host of fictional topics has led to new discoveries in science and technology.

Here Clegg tells us about 10 movies in history that have influenced people to think about science beyond the classrooms and laboratories.