While the functional elements of MEMS are miniaturized structures, sensors, actuators, and microelectronics, the most notable (and perhaps most interesting) elements are the microsensors and microactuators.
The horse (Equus caballus) has made many dramatic and significant journeys. During the Pleistocene (Ice Age), more than 20,000 years ago, wild horses that had evolved in America migrated to the Old World, Eurasia and Africa. More than 6,000 year ago in the Volga basin of eastern Europe horses were domesticated and in the subsequent millennia spread to other parts of Asia, Europe, and Africa.
The biggest horses in the world are draft breeds. These horses were bred to pull or carry large loads. Included in the draft breeds are the Shire, Percheron and Clydesdale. Before the use of trucks and tractors, draft horses pulled ploughs, wagons, street cars, barges and other farm implements and conveyances. Smallest Type of Equine. The smallest horses in the world are ponies. There are several breeds specifically developed for their diminutive size. Ponies are hardy, and they tend to be longer lived than their larger brethren.