According to Genesis GOD created the first rainbow just after the flood when Noah sacrificed a load of animals. This random slaughter apparently pleased GOD because he decided to make a covenant with man never to send a flood to kill all flesh again. He seals this covenant with the creation of the rainbow.
Genesis 9:12-17: The rainbow that I have put in the sky will be my sign to you and to every living creature on earth. It will remind you that I will keep this promise forever. When I send clouds over the earth, and a rainbow appears in the sky, I will remember my promise to you and to all other living creatures. Never again will I let floodwaters destroy all life. When I see the rainbow in the sky, I will always remember the promise that I have made to every living creature. The rainbow will be the sign of that solemn promise.
To the ancient Hebrews who were ignorant of the true nature of the rainbow this idea would have seemed plausible enough. Under scientific examination however the idea that there was a time without rainbows is ridiculous. Consider the three possible conditions where rainbows would not form.
There was no solar light.
This could not have been the case. A lack of sunlight would have quickly driven all but a few special species to extinction. Genesis also mentions sunlight in the creation account.
There was no atmospheric moisture.
The bible tells us there was atmospheric moisture. At the beginning of the flood epic it rains for 40 days and nights.
Light did not refract.
This scenario does not work either. The refraction of light is what makes sight possible, without refraction light would not be focused on the retina.
Posted in Genesis, Genesis Flood, Global flood, Noahs Ark, The Genesis Flood