Dr Brian Evans from the World Organisation for Animal Health explains how the amount of antibiotics given to animals varies from country to country, and is proving hard to regulate. Pig farmer ...

Manuela Saragosa looks at the business of serving and pleasing the ever-fickle customer.

Using genes borrowed from bacteria, researchers have demonstrated fish and flies can be engineered to break down methylmercury and remove it from their bodies as a less harmful gas, offering new ways ...