We're easily fooled. Whether it's a simple optical illusion or clever trickery from Derren Brown, our eyes often deceive us. But why are we so gullible and might it actually come in handy?

Science superpower

Within the next 10 years, China could become the world's most prolific producer of scientific knowledge. But what's behind this meteoric rise up the scientific league table and what does it mean for us?

Germ warfare

Bacteria are our new friends, being trained to fight off the world's most deadly superbugs. Well, some of them.

PLUS

In this month's Q&A:

Where does the fat go when we lose weight?

How far can migrating birds fly?

Does petrol have a shelf life?

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