Knowledge4u

                     Why do we dream?    In the Third Millennium BCE, Mesopotamia and Kings recorded and interpreted their dreams on wax tablets. 1000 years later, ancient Egyptians wrote a dream book listing over 100 Common Dreams and their meanings, and in the years since we haven't paused in our quest to understand why we dream so. after a great deal of scientific research technological advancement, and persistence we still don't have any definite answers but we have some interesting theory. We dream to fulfill our wishes. In the early 1900s, Sigmund Freud proposed that while all of our dreams, including our nightmares, are a collection of images from our daily conscious lives, they also have symbolic meanings which relate to the fulfillment of our subconscious wishes. Freud theorized that everything we remember when we wake up from a dream is a symbolic representation. of our unconscious primitive thoughts.  Freud...

           How stress affects your brain! Are you sleeping restlessly feeling irritable or moody forgetting little things and feeling overwhelmed and isolated don't worry we've all been there-you're probably just stressed out?   Stress isn't always a bad thing. It can be handy for a burst of extra energy and focus, like when you're playing a competitive sport or have to speak in public. But when it's continuous, the kind most of us face day in and day out, it actually begins to change our brain. chronic stress like being overworked or having arguments at home can affect brain size its structure and how it functions right down to the level of your change stress begins with something called the hypothalamus-pituitary in the adrenal axis. A series of interactions between endocrine glands in the brain, an opportunity that controls your body's reaction to stress. When your brain detects a stressful situation, your HPA axis. Is instantly activated and releas...

        What’s the best fuel for your car?  Historically most cars have run on gasoline but that doesn't have to be the case in the future other liquid fuels and electricity can also power cars so what are the differences between these options and which ones best.   gasoline is refined from crude oil a fossil fuel extracted from deep underground the energy and gasoline come from a class of molecules called hydrocarbons there are hundreds of different hydrocarbons in crude oil and different ones used to make gasoline and diesel which is why you can't use them to change things. Fuels derived from crude oil are extremely energy-dense, bringing a lot of bang for your buck. Unfortunately, they have many drawbacks. Oil spills cause environmental damage and cost billions of dollars to clean up air pollution from burning fossil fuels like these kill 4.5 million people each year. And transportation accounts for 16% of global greenhouse gas emissions, almost hal...

                How do ventilators work?    In the 16th century, Flemish position on Treos Vessalius described how a suffocating animal could be kept alive by inserting a tube into its trachea and blowing air to inflate its lungs. In 1555, this procedure didn't. Warrant much acclaim, but today Vessalius is a treatise is recognized as the first description of mechanical ventilation, a crucial practice in modern medicine.   To appreciate the value of ventilation, we need to understand how the respiratory system works. We breathe by contracting our diaphragms, which expands our chest cavities. This allows air to be drawn in inflating the alveoli. Millions of small sacs. Inside our lungs, each of these tiny balloons is surrounded by a mesh of blood-filled capillary in his blood that absorbs oxygen from the inflated. Never mind carbon dioxide. When the diaphragm is relaxed, the CO2 is exhaled alongside a mix of oxygen and other gases. Wh...

              What is imposter syndrome and                          how can you combat it?  Even after writing eleven books and winning several prestigious awards, My Angeles could not escape the nagging doubt that she had really earned her accomplishments. Albert Einstein experienced something similar. He described himself as an involuntary swindler whose work didn't deserve as much attention as it had received accomplishments at the level of Angelou's or Einstein's are rare, but their feeling of the project is extremely common. Why can't see many of us shake feelings that we haven't earned our accomplishments, or that our ideas and skills heartbreaking others' attention? Psychologist, Pauline Rose Clance was the first to study this unwarranted sense of insecurity in her work as a therapist, she noticed many of her undergraduate patients shared a concern, though they had high grade...

                   How to develop confidence!! When faced with a big challenge where potential failure seems to lurk at every corner, maybe you've heard this advice before. Be more confident. And most likely this is what you think when you hear it. If only it were that simple. But what is confidence? Take the belief that you are valuable, worthwhile, and capable. Also known as self-esteem. Add in the optimism that comes when you are certain of your abilities and then empowered by these after courageously to face a challenge, head-on. This is content. It turns thoughts into action.   So where does confidence even come from? There are several factors that impact confidence.    One what you're born with, such as your geans, which will impact things like the balance of neurochemicals in your brain.   Two, how you're treated this includes the social pressures of your environment, and three. The part you have cont...

                The benefits of Good Posture Has anyone ever told you to stand up straight or scolded you for slouching at a family dinner? Comments like that might be annoying,  but they're not wrong. Your posture, the way you hold your body when you're sitting or standing is the foundation for every movement your body makes and can determine how well your body adapts to the stresses on him. These stresses can be things like carrying or sitting in an awkward position. And the big ones all experience all day everyday gravity. If your posture isn't optimal, your muscles have to work harder to keep you upright and balanced. Some muscles will become tight and inflexible, others will be inhibited over time. These dysfunctional adaptations impair your body's ability to deal with the forces on it.  Poor posture inflicts extra wear and tear on your joints and ligaments increases the likelihood of accidents and makes some organs like your lungs ...

             How do vaccines work? In 1796, the scientist Edward Jenner injected material from a cowpox virus into an 8-year-old boy, with a hunch that this would provide the protection needed to save people from deadly outbreaks of the related smallpox virus. It was a success. The 8-year-old was inoculated against the disease and this became the first-ever vaccine. But why did it work to understand how vaccines function, we need to know how the immune system defends us against contagious diseases in the 1st place. When foreign microbes invade us, the immune system triggers a series of responses. In an attempt to identify and remove them from our bodies. The science of this immune response is working. Are the coughing, sneezing, inflammation, and fever we experience which work to track to turn rid the body of threatening things like bacteria. Responses also trigger our second line of defense, called Adaptive Community Special Cells called T cells are r...

What would happen if you didn’t drink water? Water is virtually everywhere from soil moisture and ice caps to the cells inside our own bodies. Depending on factors like location, fat index, age, and *** the average human is between 55 and 60% water at birth. Human babies are even wetter. Being 75% water, they are swimmingly similar to fish, but their water composition drops to 65% by their first birthday. So what role does water play in our bodies and how much do we actually need to drink to stay healthy? The H2O in our bodies works to cushion, lubricate joints, regulate temperature, and nourish the brain and spinal cord. Water isn't only in our blood and adults. Brain and heart are almost 3/4 water. That's roughly equivalent to the amount of moisture in a banana. Lungs are more similar to an Apple at 83% and even seemingly dry human bones are 31% water. If we are essentially made of water and surrounded by water, why do we still need to drink so much? Well, each day we lose 2 ...