The race with the smallest skulls has the biggest noses. According to the rest of our theory, what does that mean? It means that the engine of the smaller brain gets hot more quickly, so a wider nose allows for greater airflow as well as less warming of the air.
Essentially, the warmer the climate, the larger the nose. But the climate doesn’t explain everything. There are plenty of people with big noses in cooler climates.
Einstein was known for his huge nose. And he’s also famous for one of the most unique and powerful minds in the past 200 years. If you assume that his brain was more powerful than the average person, he’d need more airflow to support it.
Peoples noses and ears grow throughout their lives. We’ll have to get into the ears later. What’s important here is that the nose can keep growing.
The eyes cool the brain. We’re going to develop this idea in a future post. While I think there is evidence to support it, the eyes simply do not grow, so they cannot appropriately adapt the brain to greater stress. They do have another function that relieves stress, they can emit electromagnetic waves.
The brain can get bigger.And it actually does until a certain point. People’s brains begin to shrink after their fortieth birthday.
So yes, the climate matters. But not just the external climate. The internal climate as well. There are a couple of actions the body can take to neutralize the higher brain entropy: balding and a bigger nose.
What determines the solution? Let me remind you of all of our studies on eyesight. Essentially, poor eyesight is a symptom of high brain entropy. If you opted for glasses or contacts, you may force your body into a constant elevated state. The brain thinks it’s at equilibrium, but it’s not. So instead of increasing airflow [with nose enlargement], it reduces entropy by cooling the top of the head.
Don’t they prove evolution? Not exactly. They don’t prove that humans were once apes. They prove that humans once looked different.
Let’s look at the brain as a computer. Except as our computer speeds get faster and faster, the processors get smaller and smaller. So a decent computer now is hundreds of times faster than those decades ago, but it’s also much, much smaller.
But the brain does not offer us that opportunity. The substance of the brain has not changed in millions of years. But the speed of life and number of decisions that we make every day has increased exponentially. Why does that matter? Because if we didn’t make more efficient computer chips, if we just used the materials that they had in the 1970s to create computers now, computers today would be behemoths. There would be no portable smartphone, especially at this speed.
So if we need better processing power, with the same materials, the computers get bigger. So the heads would be smaller years ago, when the demands were so much lower.
If you look at entropy in the brain, and assume that stress causes higher entropy. We also assume that the brain has a stress or entropy limit. As the demands on the brains grew, the brain had to get bigger. Otherwise, it would overheat.
So, of course, any ancient skulls you find will probably be smaller. This is more evidence of how well the human body can adapt to stress than proof that we evolved from apes.
But not all ancient skulls are smaller. Neandrathals are roughly the same size as humans today. So we have some more exploring to do.
I started reading Sapiens last week. I’m only one chapter in, and I need to interject.
The first chapter gives an in-depth look at how different pre-human ancestors lived, and homo sapiens eventually ruled them all.
Here’s my take on it. It’s much simpler. If you assume that we all came from the same DNA, could different species exist? Yes, sort of. You have these different people on different parts of the globe, with different DNA. Not all that different, but up to four percent, according to Harari. We know that DNA is not stationary, and that the diet, lifestyle, and particular stresses associated with these populations would have mutated their genes differently. So, of course, you have different populations with different physical characteristics, because they evolved based on their particular environment.
I’d compare it to remote jungle tribes with little or no communication with the outside world, and a very distinct culture, mindset, and diet. They may look, act, and appear different than us, but we still call them humans.
So how did all the other species ‘die off’?
They didn’t. Well there’s the flood, which was a sort of convergence. I see it more that as resources became more plentiful, and diversity of food, lifestyle, and religion seeped from culture to culture, the DNA began to converge as well. Not that we are all so similar, but we’re all so different that it’s hard to call them different species any more.