Netflix has revealed that it spent $233.1 million (£193.8 million) on making 3 Body Problem, a science fiction series which rose to number one on its top ten list when it debuted in March last year.

"3 Body Problem" is based on Liu Cixin's "Remembrance of Earth's Past" novel trilogy. Here are nine of the biggest differences between the show and books. Warning: Major spoilers ahead for season one ...