The earth is running a fever and scientists predict it is going to get much worse. Data from NASA satellites can be used to monitor climate change and study the possible causes.

This miraculous looking 'traffic lights' experiment shows a solution changing color (blue, red, green, red, yellow). The color can then be reversed to red through the addition of oxygen, by pouring it into a another container.

James Cameron - director of blockbusters such as Aliens, Terminator, Titanic and Avatar - reflects on his childhood, his insatiable curiosity, and his love of exploration and science fiction.