12 Events That Will Change Everything, Made Interactive. Understanding Evolution. Science's 10 most beautiful experiments with dates.
BallDroppings. Bitter taste receptors regulate upper respiratory defense system. 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. But based on genetics, up to 25 percent of the population cannot detect certain bitter flavors (non-tasters), 25 percent can detect exceedingly small quantities (super-tasters), and the rest of us fall somewhere between these two extremes. What if Yellowstone's supervolcano erupts? 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. Scientists Discuss the Effects of a Geomagnetic Field Reversal. 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. The last reversal happened 780,000 years ago during the Stone Age, and indeed there's evidence to suggest the planet may be in the early stages of a pole reversal right now. But should we really fear this event? Weak field Continental shifts? Sooner or later. 10 Interesting Futuristic Materials. 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. Every person has a unique tongue print:…just like our fingers! Untitled. Why Nikola Tesla was the greatest geek who ever lived. JST VIRTUAL SCIENCE CENTER.
On the Water - Page 4. Declining testosterone levels in men not part of normal aging, study finds. 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. " Many older men have low levels of the sex hormone testosterone, but the cause is not known. Few population-based studies have tracked changes in testosterone levels among the same men over time, as their study did, Wittert said.
On average, testosterone levels did not decline significantly over five years; rather, they decreased less than 1 percent each year, the authors reported. Home : Scientific Reports. 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”. The new particle is made up of three quarks, and only exists for something like .00000000000000000000001 seconds. If it only exists for an amount of time that can not really be observed, then how do we know if it even exists? Well, scientists examine the end product, and from those results they are able to determine (somewhat) what type of particle existed. The ultimate goal of the Large Hadron Collider is to discover the existence of the Higgs Boson Particle. The Higgs Boson particle is expected to be found later this year. I am not a scientist, obviously, so why not hear it from the source. LHC Physicists Explain the Higgs Boson Particle. How Quantum Suicide Works".
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. CanvasMol. Latest Science News. News April 2012 : Nature.