Because chickens lack teeth, they need another way to break apart the food they eat before reaching the stomach, and for this reason, chickens have a gizzard in which stones they swallow are used to grind their food.

Until the European Convention on Human Rights came into effect in 2000, no law of privacy was as yet acknowledged by British courts.

Since the path-breaking discovery, just over fifty years ago, of the structure of the DNA molecule, scientists have made astounding progress to understand and manipulate this most important of biological molecules.