Science (from Latin scientia, meaning "knowledge") is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.
All these statements ( human beings are created from clay, from water, from congealed blood) are absolutely correct. The creation of human being has stages; the clay is one of them, the water is also a stage and semen fluid is from water, while the congealed blood is a stage after the formation of the zygote.
Modern science confirms all these stages as you can see the books of embryology.
Islam puts the respect of the human being as top priority. It is not allowed in Islam to disrespect the human being and his body even after death. Donating the organs after death is allowed only to save the sacred life of another human being.
Donating the human body for scientific research is good and can be even compulsory if there is no other human body which can suffice, but in this age, there ae thousands of non Muslims who are been taking part in such researches which meets the need.
It is not allowed to disrespect the human dead body unless there is no way to avoid it and it becomes the only way to serve other human beings' compulsory medical needs.
This is an issue hotly debated among the Muslim scholars all over the world. I myself have been following the debate and also observing the scientific method for the last ten years. There are some aspects of the Islamic calendar which can be surely based on the scientific data; however, there still are issues which science has not been able to solve for us as yet.
At this stage, science is able to provide for us all the details about the movement and position of the moon around the earth: it can precisely predict when the birth of the new moon will occur, at what angle and at what location in relation to our earth.
We are also told by the experts that when and where the moon will be visible; and where it cannot not be sighted. For example, we are told that the first sighting of the crescent is possible only sixteen hours after the birth of the new moon. Experts can also give us a graph showing the location where the sighting will be possible.
For the last `idd, we were told that the sighting will only be possible for those who are west of the Atlantic Ocean. This was proved correct by the sighting of the moon in North America (I saw it myself in Dallas, TX) on Monday, the 19th of February, 1996.
I personally have confidence in such predictions based on the scientific data. BUT the problem lies in the following: (a) the 16 hour criterion by the experts is based on the observation done by the scientists in North America and Europe during the last 90 years. (b) reliable witnesses in the Middle East have claimed the sighting of the moon when the new moon was just 9 hours old.
When I look at this situation, I am faced with two possibilities: EITHER the sixteen hours criterion is valid only in the western hemisphere and that it might be possible to sight the moon of an age lesser than sixteen hours in desert areas where the atmosphere is much more clear. OR the reliable people in the Middle East have seen something but not the moon!
In conclusion, although I trust and have faith in the scientic data regarding the sighting of the crescent, we still need further confirmation from the scientific world about the universality of the sixteen hours criterion for moon sighting. When this criterion becomes universal, then it will be definitely possible for us to predict the beginning of the Islamic months well in advance. Insha Allah, we will reach to that stage of certainty sooner rather than later. Amin.