Vertigo- A conflict between the signals sent to the brain by your balance and the position-sensing systems in your body are what cause dizzy spells that are best described as vertigo. Vision, sensory nerves and skin pressure are the three main sources of information input that your brain uses to balance your body.
Bison are large, even-toed ungulates in the genus Bison within the subfamily Bovinae. Two extant and six extinct species are recognised. Of the six extinct species, five went extinct in the Quaternary extinction event. Bison palaeosinensis evolved in the Early Pleistocene in South Asia, and was the evolutionary ancestor of B. priscus (steppe bison), which was the ancestor of all other Bison species.
Bison (Buffalo) - Bison bison Perhaps no other animal symbolizes the West as dramatically as the American bison. In prehistoric times millions of these animals roamed the North American Continent from the Great Slave Lake in northern Canada, south into Mexico and from coast to coast.