How Does 5 Weird Ways Identical Twins Aren't Actually Identical Work?

Identical twins are born from one egg and one sperm, but that doesn’t always mean they’re exactly the same inside.

Imagine two kids who start playing on the same playground. At first, they look alike, same clothes, same toys, but as they play, they choose different games, make different friends, and even get hurt in different ways. Over time, they become more unique. That’s like how identical twins can end up with different personalities, favorite foods, or even different hair colors later on.

Think of identical twins as two pizzas that came from the same dough and sauce. But one gets extra cheese, while the other gets pepperoni. Even though they started the same, their choices make them different. Sometimes, a twin might get more sunlight or eat a lot of blueberries, which can change how they look or feel compared to their sibling.

If one twin takes care of a pet and the other doesn’t, that changes how they grow up, even if they started from the same egg! Just like two kids who got different jobs will have different experiences.