Why are eggs smelly?

Eggs can develop a strong smell due to the presence of sulfur compounds, particularly when they are overcooked or spoiled. When eggs are heated excessively, the proteins break down and release hydrogen sulfide, which has a characteristic rotten egg odor. Additionally, if eggs are past their expiration date or improperly stored, bacteria can grow, contributing to an unpleasant smell. Proper cooking and storage can help minimize these odors.