The Enneagram is a personality typing system. This system uses nine personality types. Every person has some aspects of all nine types but is rooted in one.


Gestalt is a German word meaning the essence or shape of an entity's complete form. First popularized in the 1970s the term means the totality of the situation.
Green Flash

Green Flash

The green flash is a green light visible just for a second after the sun sets below the horizon. The high frequency green light remains visible after sunset.

History of Earth

The types of significant events which have shaped the history of earth, such as the geologic formation, the origin of live, evolution, and human achievements.

How To Estimate Your Distance From Lightning

A cool trick to measure the distance of lightning from your location is to start counting when you see a flash and divide by five when you hear thunder.
IUPAC Nomenclature

IUPAC Nomenclature

IUPAC Nomenclature is a system for naming organic molecules created by the International Union of Pure & Applied Chemistry to provide unique names to molecules.
Lucid Dreaming

Lucid Dreaming

Lucid dreaming is a dream in which the dreamer is consciously aware that he or she is dreaming. Lucid dreams can be dream-initiated or wake-initiated.


Mononucleosis, known as the kissing disease, is a viral infection that causes fatigue, fever, sore throat and swollen lymph glands and is contracted via saliva.

Newton's Laws of Motion

Newton’s laws of motion: objects at rest remain at rest, acceleration of an object is related to the force applied to it, for every action there is a reaction


Pinacocytes are the flattened contractile cells in which the outer layer of most sponges (Poriferans) are composed. These cells form the pinacoderm.
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