If you glance through the Bible and the Koran you may find several points which appear to be exactly the same in both of them, but when you analyze them closely, you realize that there is a difference of 'chalk and cheese' between them. Only based on historical details it is difficult for someone who is neither conversant with Christianity or Islam to come to a firm decision as to which of the scriptures is true; however if you verify the relevant passages of both the scriptures against scientific knowledge, you will yourself realize the truth.
a. Creation of the Universe in Six Days
As per the Bible, in the first book of Genesis in Chapter One, the universe was created in six days and each day is defined as a twenty-four hours period. Even though the Koran mentions that the universe was created in six 'Ayyaams', 'Ayyaam' is the plural of years; this word has two meanings: firstly, it means a standard twenty-four hours period i.e. a day, and secondly, it also means stage, period or epoch which is a very long period of time.
When the Koran mentions that the universe was created in six 'Ayyaams', it refers to the creation of the heavens and the earth in six long periods or epochs; scientists have no objection to this statement. The creation of the universe has taken billions of years, which proves false or contradicts the concept of the Bible which states that the creation of the Universe took six days of twenty-four hour durations each.
b. Sun Created After the Day
The Bible says in chapter 1, verses 3-5, of Genesis that the phenomenon of day and night was created on the first day of creation of the Universe by God. The light circulating in the universe is the result of a complex reaction in the stars; these stars were created according to the Bible (Genesis chapter 1 verse 14 to 19) on the fourth day. It is illogical to mention the result that is the light (the phenomenon of day and night) was created on the first day of Creation when the cause or source of the light was created three days later. Moreover the existence of evening and morning as elements of a single day is only conceivable after the creation of the earth and its rotation around the sun. In contrast with the contents of the Bible on this issue, the Koran does not give any unscientific sequence of Creation. Hence it is absolutely absurd to say that Prophet Muhammad (pbuh) copied the passages pertaining to the creation of the universe from the Bible but missed out this illogical and fantastic sequence of the Bible.
c. Creation of the Sun, The Earth and the Moon
According to the Bible, Book of Genesis, chapter 1, verses 9 to 13, the earth was created on the third day, and as per verses 14 to 19, the sun and the moon were created on the fourth day. The earth and the moon emanated, as we know, from their original star, the Sun. Hence to place the creation of the sun and the moon after the creation of the earth is contrary to the established idea about the formation of the solar system.
d. Vegetation Created on the third day and Sun on the fourth day
According to the Bible, Book of Genesis, chapter 1, verses 11-13, vegetation was created on the third day along with seed-bearing grasses, plants and trees; and further on as per verses 14-19, the sun was created on the fourth day. How is it scientifically possible for the vegetation to have appeared without the presence of the sun, as has been stated in the Bible?
If Prophet Muhummad (pbuh) was indeed the author of the Koran and had copied its contents from the Bible, how did he manage to avoid the factual errors that the Bible contains? The Koran does not contain any statements which are incompatible with scientific facts.
e. The Sun and the Moon both Emit light
According to the Bible both the sun and the moon emit their own light. In the Book of Genesis, chapter 1, verse 16 says, "And God made two great lights; the greater light to rule the day, and the lesser light to rule the night".
Science tells us today that the moon does not have its own light. This confirms the Koranic concept that the light of the moon is a reflected light. To think that 1400 years ago, Prophet Muhummad (pbuh) corrected these scientific errors in the Bible and then copied such corrected passages in the Koran is to think of something impossible.