Why the egg break when a chicken sits on it?

The egg doesn't break when a chicken sits on it! This is a common misconception.

Here's why:

* Egg Shell Strength: Chicken eggshells are surprisingly strong. They're designed to withstand the weight of the mother hen, and even more importantly, the force of a chick hatching from within.

* Incubation Process: The hen doesn't break the egg; she provides the warmth needed for the chick to develop inside. The chick itself hatches from the egg by breaking the shell from within using a specialized "egg tooth."

So, the next time you see a hen sitting on a nest, remember that she's not trying to break the eggs, but rather helping new life emerge.