Cosmic evolution is the scientific study of universal change. It is an intellectual framework that offers a grand synthesis of the many varied changes in the assembly and composition of radiation, matter, and lifethroughout the history of the universe. While engaging the time-honored queries of who we are and whence we came, this interdisciplinary subject attempts to unify the sciences within the entirety of natural history—a single broad scientific narrative...

Chemical Evolution is the hypothesis that simple chemical compounds in the ancient atmosphere and ocean combined by natural and spontaneous chemical reactions to form larger, more complex substances that eventually lead to the origin of life and the start of biological evolution.

From online Wikipedia Stellar evolution  is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe. All stars are born from collapsing clouds of gas and dust, often called nebulae or molecular clouds. Over the course...

From online Wikipedia Organic Evolution or abiogenesis or biopoiesis is the process by which life arose from inorganic matter. The word is usually used to describe the processes by which life on Earth originated. The earliest known life existed between 3.9 and 3.5 billion years ago, in the Eoarchean era, the time after the Hadean era in which the Earth was essentially molten. Scientific hypotheses about the origins of life may be divided into several...

From online Wikipedia Macroevolution  is evolution on a scale of separated gene pools. Macroevolutionary studies focus on change that occurs at or above the level of species, in contrast with microevolution, which refers to smaller evolutionary changes (typically described as changes in allele frequencies) within a species or population. The process of speciation may fall within the purview of...

From online Wikipedia Microevolution  is the changes in allele frequencies that occur over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow, and genetic drift. Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution. Ecological genetics concerns itself...