How do chickens lay so many eggs?

Question

I’ve heard chickens can lay eggs every 1-2 days. It baffles me that something so (relatively) big can come out of them so often. How do they produce so many with such limited internal space? How many are developing in them at any given time?

In: 2833

Answer 1

Selective breeding. They should only lay about 30 a year or something but have been bred to lay daily.