Nature – The Chicken Egg

A fertilized chicken egg is a very special creation. Before even thinking about a chick developing in an egg, it is interesting to ponder a few questions about the shell:

How does a chicken manage to get a shell around that slippery, raw, fertilized egg?

How does a chicken know it needs to make a shell with porosity so that the chick will be able to breathe?

How would mindless evolution know how to manufacture such a shell?

It turns out that the chicken has little to do with the formation of an eggshell—the egg actually grows the shell around itself! It does this using processes that are also seen in bones and seashells. Around the egg is a membrane, and evenly spaced on the membrane are points where columns of calcite (a form of calcium carbonate) form. These columns stack together side by side to form the shell. The shell itself is highly specialized. Each eggshell has about 10,000 tiny pores. The developing chick needs these pores to breathe.

Within the first few days after the egg is laid, blood vessels begin to grow out of the developing chick. Two of these attach to the membrane under the eggshell and two attach to the yolk. By the fifth day, the tiny heart is pumping blood through the vessels. The chick feeds from the yolk with the yolk vessels and breathes through the membrane vessels. The chick gives off carbon dioxide and water vapor as it digests the yolk. These waste products are picked up by the blood vessels and leave through the pores in the eggshell. … So here’s another question:

What makes those blood vessels grow out of the chick, and how do they know where to go and what to attach to?

By the nineteenth day, the chick has gotten very big and the oxygen it has been getting through the pores in the shell is no longer sufficient to sustain its life. How does it know what to do next? A small tooth called the “egg-tooth” has grown on the end of its beak and the chick uses this to peck a hole into an air sack at the flat end of the egg. The air sack provides only six hours of air for the chick to breathe, so instead of relaxing and breathing deeply, the chick pecks a small hole through the shell to gain access to the outside air. Two days later, on the twenty-first day, the chick “hatches” out of the shell.

Each step in the development of the chick defies evolutionary logic because if even one step in the process is missing or out of order, the chick will die. Timing is absolutely crucial!

The process must be orchestrated by God our Creator. The impersonal plus time/plus chance is not an adequate explanation for the wondrous complexities of life as we observe it. There had to be a Designer and His name is the Lord Jesus Christ (John 1; Colossians 1; Hebrews 1).

Sources: Dr. Jobe Martin, The Evolution of a Creationist (Rockwell, Texas: Biblical Discipleship Publishers, 2013), pages 209-211 and