Sceince has discovered that there are about 7 layers of skin which are:

Epidermis, consisting of seven layers

1. Stratum Corneum
2. Stratum Lucidum (only in thick skin like the palm of the hand or the foot sole.)
3. Stratum Granulosum
4. Stratum Spinosum
5. Stratum Germinativum

Dermis consisting of 2 layers

1. Dermal Papillary layer
2. Dermal Reticular layer (the location of a lot of structures, such as hair follicles & blood vessels)

Some also count Hypodermis (subcutaneous fat) as a layer of skin

Quran 1400 years ago tell us that there are layers of skin (Skin over Skin)

“Surely! Those who disbelieved in Our Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.) We shall burn them in Fire. As often as their skins are roasted through, We shall change them for other skins that they may taste the punishment. Truly, Allah is Ever Most Powerful, All-Wise.”

Consider here
1- Skins (plural) i.e. Layers of skin
2- Through here literally means

-From one side of an opening or location to the other
-By means of; with aid of; through the act or agency of
-Via , Or making a way

The Layers of Skin was foretold in Quran, however scince discovered it by 1868 found by a young Berlin doctor, Paul Langerhans.

“In February 1869, he presented a thesis entitled “Contributions to the microscopic anatomy of the pancreas”, in which he refers to islands of clear cells throughout the gland, staining differently than the surrounding tissue. He noticed that these areas were more richly innervated, but he could not suggest a function, except for the incorrect hypothesis that they might be lymph nodes.

One year before, still as an undergraduate, he analysed epidermal skin cells as part of an open competition organised by Berlin University. The branched skin cells resembling neuron, described in his paper entitled “On the nerves of the human skin”, remained an enigma for over a century before their immunological function and significance were recognised. “
Source Major_scientific_contributions