04/29/2026
🥚 Basic but cool
* The color of an egg (white vs brown) depends on the breed of the chicken, not nutrition.
* Chickens with white earlobes usually lay white eggs. Red earlobes usually mean brown eggs.
* Eggshells are mostly made of calcium carbonate, the same material as chalk.
🍳 Nutrition + science
* One egg has about 6–7 grams of high-quality protein.
* Eggs contain all 9 essential amino acids, making them a “complete protein.”
* The yolk holds most of the nutrients, including vitamins A, D, E, K, and choline.
* The yellow/orange color of the yolk depends on the chicken’s diet (more corn or marigold = deeper color).
🐣 Development + biology
* A fertilized egg can start developing into a chick only if kept warm (around 99–102°F).
* Store-bought eggs are almost always unfertilized, so no chance of a chick.
* It takes about 24–26 hours for a chicken to form one egg.
* Chickens can lay eggs without a rooster present.
🤯 Weird + surprising
* Eggs have a natural protective coating called the “bloom” that helps keep bacteria out.
* In the U.S., eggs are washed, which removes the bloom, so they must be refrigerated. In many other countries, they are not washed and can sit at room temp.
* Sometimes eggs have double yolks, especially from younger hens.
* Rarely, a hen can lay an egg inside another egg (yes, egg-ception).
* Eggshell color doesn’t affect taste, but freshness and diet do.
🔬 Physics + structure
* An eggshell has around 7,000–17,000 tiny pores.
* Eggs are strongest when pressure is applied evenly (like squeezing from both ends).
* The shape helps distribute force, which is why it’s hard to crush an egg evenly in your hand.
🍽️ Cooking facts
* Fresh eggs are harder to peel when boiled. Slightly older eggs peel easier.
* The green ring around a hard-boiled yolk happens from overcooking (a sulfur-iron reaction).
* Eggs coagulate (solidify) at relatively low temps, which is why they cook quickly.
🧠 Random trivia
* The largest egg laid by a chicken weighed over 12 ounces.
* Chickens can “control” whether an egg is fertilized after
