Why are some eggs thicker than others? An in-depth look at eggshell quality
                                
                                
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                                    5 min read                                
                            
                                Over 95% of a dry eggshell is calcium carbonate, yet despite this consistency, the final shell thickness can vary dramatically. Why are some eggs thicker than others is a complex question with multiple contributing factors related to hen health, nutrition, and environmental conditions.