Rewarding yourself for good behaviour can be self-destructive or motivating. Here’s how to do it right

The more we justify things to ourselves, the more flexible we get with our own code. For example, athletes who can justify ...

These robots can clean, exercise - and care for you in old age. Would you trust them to?

It sounds like something from a sci-fi film - but some scientists believe this clever new tech could help alleviate strains ...