The lower-case letter Î³ {\displaystyle \gamma } is used as a symbol for: 1  Chromatic number of in graph theory. 2  Gamma radiation in nuclear physics. 3  The photon, the elementary particle of light and other electromagnetic radiation.  Surface energy in materials 1  science. The Lorentz factor in the theory of relativity.
The Social Hierarchy in Herds of Domestic and Wild Horses. Within the band there is a hierarchy with one mare co-leading the band. While the stallionâs role is to protect the harem from predators and other stallions; the dominant mare leads the band to shelter, food and water.
A herd is at least 10 animals, but can range into the millions if there are enough animals in that herd. Commonly in Africa herds of elephants some even as small as 10 members can be found and sometimes even join up with larger herds in search of food and water. Source(s): National Geographic, Planet Earth Series.