Stephen Hawking showed that black holes, regions with gravity so strong that even light cannot escape, emit particles and eventually evaporate. This process is called Hawking radiation. But a question arises: where does the information about what fell into the hole go? According to quantum mechanics, information cannot simply disappear. One hypothesis, known as the 'firewall,' claimed that at the event horizon, the boundary beyond which nothing returns, an infalling object encounters a blazing wall of particles that instantly destroys it. However, this contradicts the smooth curvature of spacetime — how gravity, according to general relativity, deforms the very fabric of reality: near the horizon, in the absence of sharp mass jumps, the curvature should remain finite and not create extreme temperatures. A more modern view relies on the idea that the black hole's interior and its radiation cannot be separated. They are intertwined like pages in a book: an imprint on one instantly transfers to another. In physics, this phenomenon is called quantum entanglement — a nonlocal connection where the state of one particle immediately affects the state of another, no matter how far apart they are. Gravity stitches them into a single whole. A curious fact: any point inside the hole carries the imprint of everything that fell in, as if each page holds the full text. This is an analogy for the holographic principle, where information about a three-dimensional volume is encoded on a two-dimensional surface. So there is no firewall: the horizon is calm, and entropy, a measure of disorder reflecting the number of possible microstates of a system, changes regularly, without catastrophic energy release.