The universe is a large and wonderous place. It is full of chaos and mysteries, leading to the creation of many different elements and, somehow, life. How could life have come into existence? After all, one of the fundamental observations of our universe is that life cannot come from non-life… but what if it can? So then, where could we have possibly come from? Let’s take a look at a few interesting theories on the origins of life.

The Electric Spark Theory proposes that life on Earth originated from chemical reactions caused through the power contained in lightning. This theory puts forward the idea that, due to the atmosphere present during the early stages of the Earth’s life, molecules that we commonly find present within our bodies, such as ammonia, hydrogen, water vapor, and methane, experienced lightning shocks that generated massive amounts of energy, resulting in the molecules becoming more complex and turning into the very first form of biological life. This theory was tested in 1953, known as “The 1953 Miller-Urey Experiment”, and the results of the aforementioned experiment were shocking. The experiment resulted in the successful creation of organic molecules, some of which included amino acids commonly found in our bodies, from abiotic molecules that were thought to be commonly present on Earth before the emergence of life. This experiment supports the theory, and although it has yet to be proven as fact, it supports the idea that life can come from non-life.

The Hydrothermal Vent Theory is another interesting look into the origins of life, stating that life may have originally formed deep in the ocean near hydrothermal vents. These vents are believed to have been the main source of energy, as well as the releaser of chemical compounds thought to create the ideal environment for life to begin. It is believed that natural chambers within the vents led to the concentration of molecules within a small cavity, forcing a number of chemical reactions that resulted in the creation of life. These small cavities are believed to be a perfect starting point for life, as they are rich in minerals and provide an unchanging environment, allowing for growth and evolution.

The Panspermia Theory implies that life on Earth did not originate from here, but rather came to this planet from a collection of comets, asteroids, meteors, and interstellar dust. This theory proposes that life itself began elsewhere, whether that be on another planet or on the aforementioned celestial objects. This theory has seen supporting evidence after thorough investigation, mainly due to the discovery of organic molecules and compounds on meteors, but also partially due to the discovery of microorganisms that have shown resilience to both radiation and the vacuum of space. This theory stands out among the rest, as it begs the question of whether we are truly alone in the universe or not. If life on Earth originated from celestial objects crashing into it, then there is no reason to believe it couldn’t happen on other planets as well.

There are many theories as to how life began on Earth, and it is entirely possible that we may never find the answer; however, that does not mean that we should stop searching for the solution. Rather, we should increase our efforts in an attempt to increase our own understanding of life, and even begin our search for the potential to create true articial life from nonlife.