Narrated Abu Huraira: the Prophet (ﷺ) said,

“Allah said, “I have prepared for My righteous slaves (such excellent things) as no eye has ever seen, nor an ear has ever heard nor a human heart can ever think of.’

حَدَّثَنَا مُعَاذُ بْنُ أَسَدٍ، أَخْبَرَنَا عَبْدُ اللَّهِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ هَمَّامِ بْنِ مُنَبِّهٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏

“‏ قَالَ اللَّهُ أَعْدَدْتُ لِعِبَادِي الصَّالِحِينَ مَا لاَ عَيْنٌ رَأَتْ، وَلاَ أُذُنٌ سَمِعَتْ، وَلاَ خَطَرَ عَلَى قَلْبِ بَشَرٍ ‏”‏‏.‏

Reference: Sahih al-Bukhari 7498 (Oneness, Uniqueness of Allah (Tawheed))
In-book reference:Book 97, Hadith 123
======================
What is the science about this?
Well, just ask google!
Or
You can read this
or this