Astrobiology is the study of the origin, evolution, and distribution of life in the universe.

Astrogeology is the study of the geological history of the Earth and other planets.

Panspermia is the hypothesis that suggests that life on Earth originated from organic molecules that were brought to Earth by comets and meteorites.

The Proterozoic era is the geological era that began about 2.5 billion years ago and is characterized by the emergence of the first eukaryotic cells.

The Mesozoic era is the geological era that began about 541 million years ago and is characterized by the dominance of reptiles.

The Cenozoic era is the geological era that began about 66 million years ago and is characterized by the dominance of mammals.

The Cretaceous-Paleogene Extinction Event is the mass extinction event that occurred about 66 million years ago and is associated with the extinction of the dinosaurs.

The Greenhouse Effect is the theory that suggests that the Earth's climate is regulated by the amount of carbon dioxide in the atmosphere.

Abiogenesis is the process by which organic molecules are formed from inorganic molecules.

Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose.

Cellular Respiration is the process by which cells break down glucose to produce energy.

Fermentation is the process by which yeast and bacteria break down glucose in the absence of oxygen.

Glycolysis is the process by which glucose is broken down into pyruvate.

Cellular Respiration is the process by which pyruvate is broken down into acetyl-CoA.

Cellular Respiration is the process by which acetyl-CoA is broken down into carbon dioxide and water.