10 Most Surprising Things Ever to Come Out of Cracked-Open Eggs

In a video uploaded to YouTube, a wife cracks open a "big egg," while her husband looks on to see another egg right inside of it--with its own yolk. Later, he writes in the caption, "I can't believe it didn't kill my hen."

According to the person who posted this photo on Reddit, the egg was originally inside out. And so the person made an upside down fried egg. Pretty cool!

Hens form eggs every 16 to 24 hours. If a hen ovulates too quickly, then an egg may have more than one yolk. Usually, you see double ones. This is a triple!

Occasionally, eggs contain meat spots, which are actually bits of tissue from the oviduct or ovaries. Usually, they're small, but sometimes they're pretty big (and gross, like this one).

This hard-boiled egg had very small yolks!

This purple egg yolk is probably is a blood clot. The clot got large enough so it ended up in the oviduct (the chicken's Fallopian tube), where it was coated with a shell.

A bright red yolk may mean the hen may have an injury in her reproductive organs. Or the hen may have eaten something that turned the yolk red.

The yolk's color depends on what the hen's been eating. If the feed has more corn, the yolk will be darker; more wheat, it'll be lighter. The nutritional quality is the same for any color.

Little bits of hard, rock-like objects can be shells. Or bits of tissue.

This may be another example of an egg within an egg. The smaller one seems to be lacking a shell, which can happen (a weird quirk in the egg-laying system of a hen).

Sometimes hens get shocked or stressed, causing an already formed egg to go back up the duct where it's absorbed by another yolk.