Images and illustrations portray the formation of the oceans, including their dramatic change from a barren void to the source of all life on Earth. Volcanic activities decreased gradually after heavy rains and storms, leaving behind the solidifying lava and magma which created the Earth’s crust. Strong, ultraviolet rays penetrated straight into the ocean, which initiated the growth of cyanobacteria, giving the ocean a bluish green color. Subsequently, multicellular organisms gradually came into existence.