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Oct. 8, 2012 — A new study from a team of researchers at the Perelman School of Medicine at the University of Pennsylvania, the Monell Chemical Senses Center, and the Philadelphia VA Medical Center, reveals that a person's ability to taste certain bitter flavors is directly related to their ability to fight off upper respiratory tract infections, specifically chronic sinus infections. The new research is published in the latest edition of the Journal of Clinical Investigation. Most humans experience five types of tastes: sweet, salty, sour, bitter, and savory. The sense of taste is mediated by taste receptor cells which are bundled in our taste buds. "Sour" and "bitter" taste sensations alert the body to harmful foods that have spoiled or are toxic. Bitter taste receptors regulate upper respiratory defense system
A rough estimate based on geologic records indicates there's a 1-in-10,000 chance of a "supereruption" at Yellowstone during our lifetimes. However, given the erratic nature of volcanoes, that number doesn't mean much. The bulging pocket of magma swishing around beneath Old Faithful might never blow its lid again. Or, it might put on a surprise fireworks show next Independence Day. Scientists just don't know. But if or when it blows, what will actually happen? What if Yellowstone's supervolcano erupts?
The end of the world as we know it could come in any number of ways, depending on who you ask. Some people believe global cataclysm will occur when Earth's magnetic poles reverse. When north goes south, they say, the continents will lurch in one direction or the other, triggering massive earthquakes, rapid climate change and species extinctions. The geologic record shows that hundreds of pole reversals have occurred throughout Earth's history; they happen when patches of iron atoms in Earth's liquid outer core become reverse-aligned, like tiny magnets oriented in the opposite direction from those around them. When the reversed patches grow to the point that they dominate the rest of the core, Earth's overall magnetic field flips. What If Earth's Magnetic Poles Flip? | Scientists Discuss the Effects of a Geomagnetic Field Reversal
1. Aerogel Aerogel holds 15 entries in the Guinness Book of Records, including “best insulator”, and “lowest-density solid”. Sometimes called “frozen smoke”, aerogel is made by the supercritical drying of liquid gels of alumina, chromia, tin oxide, or carbon. It’s 99.8% empty space, which makes it look semi-transparent.
100 Amazing Things You Never Knew About Your Body - Online Nursing Programs, Schools & Degrees November 3, 2009 You think you’re learning everything you can in your biology and anthropology classes, but textbook editors simply don’t have all the space they need to give you the full story of your body. Some of the facts below are trivial, some are ancient history, and some of them may very well save your life one day. So read up, and enjoy this wild and whacky anatomical analysis. Unusual Facts You’ll probably wonder why you never heard these cool facts in biology class before.
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Decades ago, a few individuals looked at what skiers were doing on snow and thought, "Why can't I do that on a board?" Thus, the sport of snowboarding was born, and it eventually exploded in popularity. On the water, the opposite is happening. The sport of paddleboarding has been growing in popularity and some folks are thinking, "Why can't I do that on skis?" On the Water - Page 4
A new study finds that a drop in testosterone levels over time is more likely to result from a man's behavioral and health changes than by aging. The study results will be presented Monday at The Endocrine Society's 94th Annual Meeting in Houston. "Declining testosterone levels are not an inevitable part of the aging process, as many people think," said study co-author Gary Wittert, MD, professor of medicine at the University of Adelaide in Adelaide, Australia. "Testosterone changes are largely explained by smoking behavior and changes in health status, particularly obesity and depression." Declining testosterone levels in men not part of normal aging, study finds
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LHC Physicists Explain the Higgs Boson Particle The Large Hadron Collider is pretty interesting. New subatomic particles are being discovered with its utilization. Just last Friday a new particle was discovered – “neutral Xi_b^star baryon”.
A man sits down before a gun, which is pointed at his head. This is no ordinary gun; it's rigged to a machine that measures the spin of a quantum particle. Each time the trigger is pulled, the spin of the quantum particle -- or quark -- is measured. Depending on the measurement, the gun will either fire, or it won't.
News April 2012 : Nature