Espers
A very small group of humans possess ESP abilities, and are called "espers". Espers are able to read thoughts, sometimes at great distances, and often with some perception of the direction of origin of the thoughts. Espers occur extremely rarely, with only 120 registered Espers among Earth's 10 billion citizens. While two or more Espers are perfectly able to communicate telepathically (i.e. simply read each other's thoughts), an unwritten rule among Espers requires them to communicate verbally if non-Espers are present.
Read more about this topic: Humans (Noon Universe)