After Weeks, Eggs Finally Hatch. But Chicks That Have Been Growing inside Are Rare Species

There’s an old joke that goes: “What would you think if you found $20 in your pants pocket?” To which the other person responds: “I’d think I had someone else’s pants on.”

What if we applied that to eggs. What if you took an ordinary egg and found something extraordinary inside it?

Like say, a jet-black chicken? Would you think the egg had spoiled?