Telepathy  is the claimed innate ability of humans and other creatures to communicate information from one mind to another, without the use of extra tools such as speech or body language. Considered a form of extra-sensory perception or anomalous cognition, telepathy is often connected to various paranormal phenomena such as precognition, clairvoyance and empathy. 

Telepathy was the first wireless telegraphy of the Indian Yogis. Yogis send their messages through telepathy & has been practices sinces ages by highly Advance Yogis of India. Maharishi Patanjali talks about it in his Yogasutras as how to achieve the occult powers by Yoga but he also warns about it.Thought travels with electric speed that is unimaginable. Sometimes you think of a friend with such intensity in the evening that you get a letter from him early in the morning. This is unconscious telepathy. Your powerful thought has travelled and reached the brain of your friend immediately and he has replied you then and there. So many interesting and wonderful things are going on in the thought-world. Ordinarily, people who have not developed the power of telepathy are groping in the darkness.

Telepathy is communication of mind with mind. The pineal gland which is considered by occultists as the seat of the soul plays an important part in telepathy. It is this pineal gland that actually receives messages. It is a small piece of nervous matter that is imbedded in the brain or hind-brain in the floor of the mind ventricle. It is an endocrine gland that is ductless. It has got an internal secretion which is directly poured into the blood. Telepathy is direct transference of thought from one person (sender or agent) to another (receiver or percipient) without using the usual sensory channels of communication, hence a form of extrasensory perception (ESP). You can influence another man without any audible language. What is wanted is concentration of thought that is directed by the will. This is telepathy.  While the existence of telepathy has not yet been proved, some parapsychological research studies have produced favorable results using such techniques as card guessing with a special deck of five sets of five cards. The agent may simply think of a random order of the five card symbols while the percipient tries to think of the order on which the agent is concentrating.

Great adepts or Mahatmas who live in the Himalayan caves transmit their messages through telepathy to deserving aspirants or Yogis in the world. These Jijnasus or Yogis carry out their orders and disseminate their knowledge far and wide. It is not necessary that Mahatmas should come on the platform and preach. Whether they preach or not, it does not matter. Their very life is an embodiment of teaching. They are the living assurance for God-realisation. Preaching on the platform belongs to the second-class type of men who have no knowledge of telepathy. The hidden Yogis help the world through their spiritual vibrations and magnetic aura more than the Yogis of the platform. In these days, Congressmen expect even Sannyasins to work on the Congress platform. They even force them. As their minds are saturated with Karma Samskaras, they are not able to grasp and understand the grandeur, utility and magnanimity of pure Nivritti of Dhyana-Yogis. The field or domain of activity of Sannyasins is entirely different. They cannot become presidents of Sabhas or Mandalas. Their sphere is of a cosmic nature. Their field is Adhyatmic that relates to the science of the Self.

Quantum Mechanics

In seeking a "scientific explanation," some telepathy proponents have claimed there to be connections between scientific quantum theory as a basis for telepathy. Such modern concepts of telepathy have attempted to draw both legitimacy and scientific curiosity, by making both general and specific analogies between the "unaccepted unknowns" of religion and parapsychology, and the "accepted unknowns" in the quantum sciences, where the classical and understood concepts of physics (time and space) don't generally apply. The clear example is in quantum mechanics and its inherently theoretical cousin, string theory. Both have radically changed modern concepts regarding the nature of time, space, energy, and matter, and the relationships between each.

In general the concept is that the mind (human or otherwise) is simply evolved physical scaffold for an entity of electrical and quantum impulses. This system, in turn is claimed to have been developed abilities to influencing and receiving "quantum fluctuations" from other minds. In essence, proponents claim that telepathy is not "extrasensory", rather that the brain is the telepathic organ, its connections to other brains are not physical, but psychic, and the very definition of the psychic medium is the localized inertial frame of reference which is affected by the mind.

This new and "scientifically-grounded" concept of telepathy provides the context for further speculations. However, physicists and skeptics state that quantum mechanics does not show classical effects until objects are at sub-nanometer scales, and since the physical components of the mind are all much larger, these quantum effects are considered negligible. Proponents counter that the scientific statements carry two flawed assumptions, namely that the experience of telepathy need be a classical effect, and that the mind is sensitive to only classical effects. Some physicists, such as Nick Herbert, have pondered whether or not quantum mechanics' "non-locality" (or "spooky action at a distance") principle would permit instantaneous communication such as telepathy. Experiments have been conducted (by scientists such as Gao Shen at the Institute of Quantum Physics in Beijing, China) to study whether or not quantum entanglements (connections allowing instantaneous information exchange) demonstrated at the level of electrons can also be verified between human minds. Such experiments usually include monitoring for synchronous EEG patterns between two hypothetically "entangled" minds.

Technologically-assisted telepathy

Some, for example the science-fiction writer Spider Robinson in the book Deathkiller, have envisioned neurological research leading to technologically-assisted telepathy, also called techlepathy. As of 2004, scientists have demonstrated that brain imaging can be successfully used to recognise distinct thought patterns, and tell, for example, whether experimental monkeys thought about juice or water, and whether a human participant thought about a rotating cube or moving his paralyzed arm. Both implanted electrodes recording neurons' activity and outside electrodes recording electromagnetic activity of the brain can be used.

Telepathic communication between humans and animals

Some people believe that it is possible for humans and animals to communicate through telepathy. In the past, this type of interspecies communication was thought to be a normal part of life, such as in Native American culture. For more information on this subject, see books by Rupert Sheldrake (Dogs who know when their owners are coming home), and professional animal communicators Penelope Smith and Marta Williams.

Delusions of telepathy - Schizophrenia can produce delusions that the sufferer is in telepathic communication with others; such delusions include thought broadcasting and thought extraction.

Other Facts

There is a long tradition of anecdotal evidence for foreseeing the future in dreams and by various devices such as observing the flight of birds or examining the entrails of sacrificial animals. Precognition has been tested with subjects required to predict the future order of cards in a deck about to be shuffled or to foretell results of dice throws, but the statistical support for it has generally been less convincing than that from experiments in telepathy and clairvoyance.

Primitive species used it as a survival mechanism. It involves mind to mind contact - communication - of one mind with another by means beyond the normal or ordinary - beyond the frequencies of the five physical senses - sight, hearing, touch, taste, smell. More on.......... http://kaalchakra0.tripod.com