In my opinion, the human brain is the one of the most fascinating things this world has to offer. Think about it, this organ creates thoughts and creates what is essentially life for us and all other animals. If there is no after-life or soul, the brain is all we have, the world as we see it is a result of our brains. Though the make up of all our brains is the same, they all work a little different.
How can we know how other people see the world? Depending on your philosophy, it is possible that not everyone sees the world in the same way. One theory is; everything we see in the world is completely made up in our heads, therefore there are no real things, it would be as though we are living a dream. Other schools of thought would suggest that there are truths in the world, that everything we see is actually there, not just created in our minds. There is also perception, an in between these two theories, there are real things in the world, but we don't actually see them, we see what they cause us the perceive.
Whether you enjoy conversations like these or you think they are just a bunch of bologna, these are thoughts that only humans have. We are rational beings and they are a result of our brain. This infographic gives quite a few interesting facts of the brain. For example did you know the brain has 100,000 miles worth of blood vessels, that would be long enough to circle the world four times. [via]