Throughout history, many scientific books were written, and over time, as newer information was discovered, those books became obsolete and invalid. But there is one particular book whose information becomes more understandable over time.
Burns transmit the worst and most intense pain to the brain.
First-degree burn: Normal redness               (moderate pain)
Second-degree burn: Redness with blisters   (severe pain)
Third-degree: Complete loss of skin               (painless!!!)
 
The body's internal organs lack cells that sense heat and cold.
There is a special book whose contents become more relatable over time. Its name is the Quran. It is sent by God 1400 years ago. In this God-given book, there is a verse about this scientific matter.
Quran says:
An-Nisā’
إِنَّ ٱلَّذِينَ كَفَرُواْ بِـَٔايَٰتِنَا سَوۡفَ نُصۡلِيهِمۡ نَارٗا كُلَّمَا نَضِجَتۡ جُلُودُهُم بَدَّلۡنَٰهُمۡ جُلُودًا غَيۡرَهَا لِيَذُوقُواْ ٱلۡعَذَابَۗ إِنَّ ٱللَّهَ كَانَ عَزِيزًا حَكِيمٗا
Those who reject Our verses, We will cast them into the Fire. Whenever their skins are burnt through, We will replace them with fresh skins, so that they may taste the punishment. Indeed, Allah is All-Mighty, All-Wise.​​​​​​​