The Household Cavalry regiment, the soldiers who stand guard on horseback in Whitehall are made up of two main groups: the Life Guards and the Blues and Royals. Today they make up just one regiment but each has its own identity, traditions, colonels and uniform. The Blues and Royals and the Life Guard can be seen in Whitehall between 11am and 4pm every day and many visitors to London like to have their photograph taken next to the mounted soldiers. Be careful, however. As the signs nearby say, horses can both bite and kick.

Dinosaurs first appeared on earth nearly 250 million years ago and survived until a mass extinction event around 65 million years ago. This means that they were dominant animals on the planet for over 150 million years – far longer than human beings. Most scientists believe that the mass extinction of the dinosaurs was caused by a meteor landing on earth.