This verse contains the biggest scientific miracle. Allah (swt) did not make us witness the creation of the heavens and the Earth nor the creation of human beings:

﴾مَّا أَشْهَدتُّهُمْ خَلْقَ السَّمَاوَاتِ وَالْأَرْضِ وَلَا خَلْقَ أَنفُسِهِمْ وَمَا كُنتُ مُتَّخِذَ الْمُضِلِّينَ عَضُدًا﴿

(I did not make them witness to the creation of the heavens and the earth or to the creation of themselves, and I would not have taken the misguiders as assistants.) (Al-Kahf: 51)

However, He (swt) makes us witness the contrary which is the death:

  ﴾تَبَارَكَ الَّذِي بِيَدِهِ الْمُلْكُ وَ هُوَ عَلَىٰ كُلِّ شَيْءٍ قَدِيرٌ (1) الَّذِي خَلَقَ الْمَوْتَ وَالْحَيَاةَ لِيَبْلُوَكُمْ أَيُّكُمْ أَحْسَنُ عَمَلًا وَهُوَ الْعَزِيزُ الْغَفُورُ﴿

(Blessed is He in whose hand is dominion, and He is over all things competent. (1) [He] who created death and life to test you [as to] which of you is best in deed – and He is the Exalted in Might, the Forgiving. (2)) (Al-Mulk: 1-2)

Upon witnessing death, we see the person taking his last breath when the soul leaves him. After that, the human being will move on from his condition to another; to altered black mud, then to clay, then he becomes dry and then degrades and turns into soil and water.

أَزْوَاجًا (in pairs): The male and female.

If we ask those who claim that a creator does not exist, how the human was created, they will answer: coincidentally. Whereas a French scholar called Piere once said: “The possibility of the coincidence is one out of two hundred million.”! For example if you were to lay down some letters randomly then, coincidentally, you find that these letters had formed a poem by Al-Mutanabbi (a famous Arab poet), then, if you throw the letters once again, the possibility of having the same result is one out of two hundred million.

Here, Allah (swt) says that He had created the male and the female. Had the male been created coincidentally, as they claim, how would the female have been created? Thus, this is something which is not scientifically true. Allah says:

 ﴾ وَمِنْ آيَاتِهِ أَنْ خَلَقَ لَكُم مِّنْ أَنفُسِكُمْ أَزْوَاجًا لِّتَسْكُنُوا إِلَيْهَا وَجَعَلَ بَيْنَكُم مَّوَدَّةً وَرَحْمَةً ۚ إِنَّ فِي ذَٰلِكَ لَآيَاتٍ لِّقَوْمٍ يَتَفَكَّرُونَ﴿

(And of His signs is that He created for you from yourselves mates that you may find tranquillity in them; and He placed between you affection and mercy. Indeed in that are signs for a people who give thought.) (Ar-Rum : 21)