Most religions believe in a common concept of creation by a Supernatural Being. A commonly accepted account of this theory is found in the Bible, which is inscribed that God created the earth and all its content in five days and by words and on the sixth day He created man from mud. Despite the shortage of evidence to support this claim, the theory was, and it still is widely accepted by people. According to Coyne 2009, “if we came across a watch lying on the ground, he said, we would certainly recognize it as the work of a watchmaker. Likewise, the existence of a well adapted organism and their intricate features surely implies a conscious, celestial designer- God (p. 17).
A different theory that got publicity was the theory of spontaneous generation; this theory suggests that living organisms rise suddenly and spontaneously from no-living matter (Lennox, 1982). For example, crocodiles were believed to originate from logs of wood in the water. This theory was widely accepted in ancient Greek and Egypt. The theory was supported by many famously known scientists and philosophers including Aristotle, Descartes and Galileo. However, this theory was disapproved in the 19th century by Louis Pasteur, who through several experiments, proved that life had to originate from other living organisms.
Another theory explaining the origin of life is the theory of Panspermia. This theory proposes that living organisms like bacteria exists throughout the entire universe and that through meteoroids, asteroids and other heavenly bodies; they travel randomly until they find planets with ideal conditions for growth. Earth was one of the planets with these conditions and when heavenly bodies carrying living organism collided, life began. Some forms of the panspermia hypothesis suggest that life commenced elsewhere in the universe and arrived here on earth through comets, meteorites or planetary collision (Andrulis, 2011).