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  I’ve read that when the astronauts in space are out in the Sun, the temperature is +255 degrees and in the shadows the temperature is -255 degrees. Just what is the temperature of empty space? July 2003 Temperature has a precisely defined mathematical definition. For our purposes, we can say that temperature is proportional to the average kinetic energy of the random motion of a substance’s molecules. Kinetic energy is the energy something has by virtue of its motion. Molecules of all substances, even solids, have random motion and therefore an associated kinetic energy and temperature. Air molecules in a 70°F room are in vigorous random motion and thus possess kinetic energy and an associated temperature. In fact, air molecules move at hundreds of meters per second! Because these molecules are randomly moving, as many particles move up as down, and as many move left as right, they do not disturb objects. When we read that spacewalking astronauts experience certain temperature extrem

  10 Crazy Facts You Didn't Know About  Space There is so much about space, our solar system, and the galaxy that we still don't know!  Space is vast. With billions of galaxies and stars, and planets in our own solar system yet to be fully explored or understood, scientists' knowledge of space is always evolving.  There are, however, some really cool things we know about space right now!  We've compiled a list of what we think are ten stellar facts that we hope you'll think are out of this world!   1. SPACE IS COMPLETELY SILENT There is no atmosphere in space, which means that sound has no medium or way to travel to be heard.  2. THE HOTTEST PLANET IN OUR SOLAR SYSTEM IS 450° C. Venus is the hottest planet in the solar system and has an average surface temperature of around 450° C. Did you know that Venus isn't the closest planet to the sun?  That is Mercury.  You would think that Mercury would then be the hottest, but Mercury has no atmosphere (which regulates

Twenty fun facts about the ocean The ocean covers more than 70 percent of the earth’s surface. ⠀ About 94 percent of the earth’s wildlife is found in the ocean. ⠀ More than 70 percent of the earth’s oxygen is produced by the ocean. ⠀ Five percent of the land belonging to the United States is surrounded by the ocean. ⠀ The sun is what makes the ocean blue. ⠀ The deepest part of the ocean is called the Mariana Trench, which is around 7 miles deep and is located in the South Pacific Ocean. ⠀ The water pressure at the bottom of the Mariana Trench is eight tons per square inch. This means the pressure there is enough to crush you. ⠀ Coral creates its own “sunscreen” by producing coral fluoresce that protects the algae found in coral. ⠀ The largest mountain range is found underwater and is called the Mid-Oceanic Ridge that is around 40,390 miles long. ⠀ The loudest sound ever recorded was made by an iceberg. In 1997, the sound was recorded and named, “The Bloom.” It was said to be heard from

  7 Surprising Benefits of Exercise 1. Exercise is great for your brain. It’s linked to less depression, better memory and quicker learning. Studies also suggest that exercise is, as of now, the best way to prevent or delay the onset of Alzheimer’s disease, a major fear for many Americans. Scientists don’t know exactly why exercise changes the structure and function of the brain, but it’s an area of active research. So far, they’ve found that exercise improves blood flow to the brain, feeding the growth of new blood vessels and even new brain cells, thanks to the protein BDNF (brain-derived neurotrophic factor). BDNF triggers the growth of new neurons and helps repair and protect brain cells from degeneration. It may also  help people focus , according to recent research. 2. You might get happier. Countless studies show that many types of exercise, from walking to cycling, make people feel better and can even relieve symptoms of depression. Exercise triggers the release of chemicals in

12 Mind-Blowing Facts About Your Body (PART 2) 7. When We breathe, We Favor One Nostril   Dr. Foster said: "We naturally tend to alternate from one nostril then the other as this helps keep the air we breathe moist so as not to irritate our lungs. "But our bodies give one nostril a break while the other is active – we just don't know we do it." 8. We Don't Know Why We Yawn Dr. Foster said: "Many animals seem to do it, and there are different theories as to why we do—some say it helps get more oxygen in, others think it helps regulate temperature. "Either way, we all do it, we just don't why." 9. Eyes Remain Almost the Same Size Your Entire Life Copeland said: "Although our nose and ears keep growing throughout our lives, our eyes remain the same size from birth. "By three months, our eyes are the same size that they will ever be as the corneas have reached their full width." She quotes Cornell University neurobiologist Howard C.

12 Mind-Blowing Facts About Your Body   The human body is perhaps the most complex compositions ever to have existed. Jeff Foster, Medical Director of U.K. based health care provider H3 Health, suggests many of us "take our bodies for granted." "It is only when we spend the time looking at what is really involved in what makes us human that we realize how amazing our bodies are," he told Newsweek.  I am still finding out new, weird and amazing things about the body." Here are some of the most fascinating facts about your amazing body. 1. You Contain Trillions of Bacteria Dr. Natalie Carter, Versus Arthritis Head of Research Engagement, said: "We have trillions of bacteria living in our bodies and helping regulate inflammation and disease. "It has long been suggested they may affect our immune system and contribute to inflammatory arthritis, which affects over 430,000 people in the U.K. "Versus Arthritis is funding research studying the bacteria s