Retailers in the US have begun using facial recognition technology for fraud and theft detection without letting customers know.

Kevin Kelly is the founder of Wired Magazine and author of several books, among them The Inevitable. For Warp News he presents his case for optimism.

How many ancient forests are in your tank?

Ignition is a key process that amplifies the energy output from nuclear fusion and could provide clean energy and answer some huge physics questions.

Having high levels of sugar in your diet is known to be bad for your health, but cutting it out can be difficult, particularly as it can trigger a range of unpleasant symptoms.