Edible bird's nests, often called the "Caviar of the East," are one of the most expensive food products in the world. While an average nest can retail for around $2,500 a kilogram, some can go for as ...

THE humble budgie has become an unexpected menace in the latest H7N9 bird flu outbreak. H7N9 emerged in south-east China last March, infecting 136 people. It returned in October, infecting 116 more.