Fourteen centuries ago, Allah sent down the Qur'an to mankind as a book of guidance. He called upon people to be guided to the truth by adhering to this book. From the day of its revelation to the day of judgement, this last divine book will remain the sole guide for humanity. The matchless style of the Qur'an and the superior wisdom in it are definite evidence that it is the word of God. In addition, the Qur'an has many miraculous attributes proving that it is a revelation from God. One of these attributes is the fact that a number of scientific truths that we have only been able to uncover by the technology of the 20th century were stated in the Qur'an 1,400 years ago.
Of course the Qur'an is not a book of science. However, many scientific facts that are expressed in an extremely concise and profound manner in its aayath have only been discovered with the technology of the 20th century. These facts could not have been known at the time of the Qur'an's revelation, and this is still more proof that the Qur'an is the word of God. 
Anatomy has discovered that small intestines are the longest part in the digestive system, of about 5 meters long. The walls of intestines consist of 3 layers:
It has been found out that the abdominal cavity is lined with the peritoneum which is fed through the wall nerves feeding the skin, and the muscles of chest and abdomen. These nerves are affected by touch and heat. The viscera have no nerves for pain or sensation. Therefore, when the abdominal wall is anaesthetized locally, and the abdomen is open, no sensation of pain or disturbance is felt in the intestines if held, cut or even burned. But when the intestines are cut or perforated for any reason, its contents come out into the cavity surrounding the viscera, and which is rich in sensitive nerves, the pain is then very severe and the abdomen of the patient is in a state called Board Like Rigidity. It is an emergency surgical state that requires an immediate operation.
In Quran, Allah the Almighty says about the torment of hell fire; “such are given to drink boiling water, that tears their bowels asunder.” Quran Surah 47: 15
(وسقوا ماءَ حميماَ فقطع أمعاءهم ( محمد : 15
The Quran threatens the unbelievers of hot water that tears their bowels. The reasoning underlying this threat has recently become evident. It has been discovered that intestines are not affected with heat. But if they are cut, hot water therein comes out into the peritoneum which is fed through the wall nerves feeding the skin, and the muscles of chest and abdomen. These nerves are affected with touch or heat, so the hot water, after intestines are cut, causes the highest degrees of pain.
So the outer torment felt in the skin, is different from that felt in the inner intestines, due to the difference in the nature of skin structure. The feeling of former torment cannot be maintained unless the roasted skin is exchanged with a new layer, while in the case of intestines, torment is felt only by cutting the intestines with hot water. Torment is yet continuous: “As for the unbelievers, theirs shall be the fire of Gehannam (hellfire); they shall neither be done with and die, nor shall its chastisement be lightened for them, even so We recompense every ungrateful one.” Quran Surah 35:36
( والذين كفروا لهم نار جهنم لا يُقضى عليهم فيموتوا ولا يُخففُ عنهم من عذابها كذلك نجزي كل كفور) سورة فاطر- 36
All that we have seen so far shows us one clear fact: the Qur'an is such a book that all the news related in it has proved to be true. Facts about scientific subjects and the news given about the future, facts that no one could have known at the time, were announced in its verses. It is impossible for this information to have been known with the level of knowledge and technology of the day. It is clear that this provides clear evidence that the Qur'an is not the word of man. The Qur'an is the word of the Almighty God, the Originator of everything and the One Who encompasses everything with His knowledge. In one verse, God says on the Qur'an "Do they not then consider the Quran carefully? Had it been from other than Allah, they would surely have found therein much contradictions." (Qur'an Surah 4:82) Not only are there no inconsistency in the Qur'an, but every piece of information it contains reveals the miracle of this divine book more and more each day.
What falls to man is to hold fast to this divine book revealed by God, and receive it as his one and only guide. In one of the verses, God calls out to us:
"And this is a Book We have sent down and blessed, so follow it and have fear of God so that hopefully you will gain mercy." (Qur'an Surah 6:155)
In His other aayaath, Allah remarks: "Say: 'It is the truth from your Lord. Let anyone who wishes to, believe, and let anyone who wishes to, disbelieve.'" (Qur'an Surah 18:29)