The Act of Yawning
Yawning itself isn’t very exciting. In fact, the yawn is commonly used as a symbol of boredom or fatigue. Yawning is a part of our life pretty much from birth and it persists with us all throughout. No matter where you live or were born, you yawn — that’s just how your body works. The only tricky thing is this: we don’t know why exactly we yawn. There are many theories floating around as to the pervasiveness of our yawning but nothing is concrete. One theory explains that we yawn due to a subtle lack of oxygen flow, thus probing ourselves into the act of gulping down some extra oxygen. As I wrote this I began to yawn.
Why do we dream?
When you consider how much time we spend sleeping it seems like a given that we really need it. And we do! We do really need to sleep in order to stay healthy and stay alive. Some believe that dreams are random images and brain waves. Others consider them subconscious desires, unsolved problems, and experiences. The study of dreams is called oneirology. Scientists claim that dreams symbolize something hidden deep in the human psyche, but no one knows what exactly.
Do cows have a magnetic compass?
Utilizing satellite images pulled from Google Earth, a team of researchers studied thousands of grazing cows’ images and discovered a strange pattern. 70% of cows turn their heads to the north or south while eating or drinking. This is observed on all continents, regardless of terrain, weather, and other factors.
Scientists understand how magnets work to a degree but what they don’t understand is this: why do natural magnets always have a north and south pole? Further, no matter how many times you cut a magnet in half you will always get a magnet that has a north and south pole. Scientists can generate lab made magnets that only have a north or south pole, but out in the wild this is simply not the case — it has never happened, simply put we just don’t know why. You know what, let’s just set magnets aside entirely. Why do they even exist?
How do cats purr?
Cats purr when they feel happy, but no one knows how. When they purr, you don’t even hear their heart beating! Scientists today cannot figure out how exactly cats manufacture their purring. Scientists to this day don’t have a solid answer down but the leading hypothesis is that cats use the vocal folds in their larynx in order to create the vibrating sounds we interpret as purrs.
Deja vu is a French phrase which means ‘already seen,’ referring to the puzzling and mysterious feeling of having experienced a specific set of circumstances before. Someone might be having a conversation with someone they have never spoken to before and sense that the conversation is eerily and intimately familiar. Some even attribute deja vu to psychic experiences or glimpses of previous lives. As with intuition, research into the human psychology can offer more of a naturalistic explanations, but ultimately the cause and nature of the phenomenon itself remains a total mystery.
Why do we have different blood types?
Blood types have different antigens in blood cells. They are signals of antibodies that destroy foreign cells in the body. But scientists have no answer why they are different.
There is a suggestion that they are related to diseases and immunity. Human blood types most likely came to exist to fend off infectious diseases. The incompatibility of some blood types, however, is just an accident of evolution.