赤ちゃん

Here are 8 different fetuses depicted in three stages of devel- opment.





The similarity between the fetuses during the first stage of development is quite astounding, but I wonder how well this supports the theory of common ancestors. Don't misinterpret what I am saying, because I am a supporter of Darwin's Theory, it is just enjoyable to consider the argument that perhaps this stage of development is universal because it is simply the most probable way to do things, and was NOT passed down from a common ancestor. To elaborate, these molecules that make up the fetuses are arranging themselves simply due to the laws of Entropy and MO Theory, and on a molecular level, perhaps this fetus configuration is the only configuration of matter that makes sense.

For example, lets say there is a hypothetical species that, buy some crazy chance, is composed of the same organic molecules as we are. They also have sexual reproduction and other "earth-like" attributes. Would their fetuses also have the same preliminary form, even though they do not share a common ancestor to us?

This may be a bit off topic, but I think the question that I want answered is this:
"On a biological level, why do things differ, when on the atomic level, all the atoms that compose these organisms are the same?" (i.e. carbon, hydrgen, and oxygen)

Essentailly, rather than species becoming diversified, shouldn't we be converging into one, perfect species which is composed of the lowest energy states? Surely there is only one life form that can be the most thermodynamically favourable?

To put the point to an extreme: If things really try to find the lowest energy state, than inevitably shouldnt we all eventually become crystal lattices?

Hahaha... it seems strange to put that in words, but I suppose becoming a crystal is pretty cool.