The Art of Aging Through Cracks
A painting's network of tiny surface cracks, known as craquelure, is essentially a map of its history. Rather than just being signs of decay, these unique patterns are now used by experts as a "fingerprint" to identify authentic masterpieces.
Craquelure forms naturally as materials like oil paint and wood age, dry out, or respond to shifts in temperature. Because every surface reacts uniquely, no two cracking patterns are exactly the same. Art detectives study these microscopic spiderwebs to spot fakes or verify the age of a work. It turns out that what looks like damage is actually the most reliable way to prove a painting is genuine.
Source: Craquelure