Let’s start with the bad news: You are saturated with man-made chemicals, some of them toxic. Today’s exposure began when compounds in your shampoo and shaving cream seeped into your skin cells, and during your morning coffee, when you drank chemicals that were released into your brew as hot water ran against the plastic walls of your coffeemaker. It continued all day as you touched industrial chemicals in packaging, or walked through pesticide-sprayed lawns, or cooked dinner on nonstick pans.
This is just pathetic. Why should we spend anytime whatsoever trying hunting for possible toxic effects when the benefits are so trivial? The only people interested are those trying to create hysterical fears that they can exploit politically. The supposed harm of all these chemicals is utterly trivial. Yes, it sounds terrible that childhood leukemia cases have supposedly increased 28% since 1974 but in absolute terms, that means next to nothing. Leukemia is very rare so even a significant increase in cases translates into very few additional cases. There are only 3,500 cases of childhood leukemia every year so an increase of 28% comes to only 980 additional cases (not deaths). That is out of a population of 74 million children. That means a child's risk of death has increased from roughly 1 in 29,000 to 1 in 21,000. That's an utterly trivial increase in risk. Even if every additional case was caused by chemical exposure, we would actively kill many times more children by wasting resources trying to save a few hundred lives instead of spending those resources on millions of children. That is not to mention the harm done by people not having access to the benefits that the chemicals bring. It's utterly irresponsible journalism to crank out a hysterical story like this one without putting into perspective the lethal tradeoffs of blanket bans of thousands of chemicals. Just by raising the cost of medication, car seats, sterile surfaces or making fruits and vegetable more expensive, we could easily kill way more children than we save.
Thanks in part to the inherent awesomeness of the word itself, it seems everyone is talking about ultracapacitors. Ultracapacitors store energy in an electrical field between two plates. They can charge faster than batteries, emit powerful pulses of electricity, and last almost indefinitely. Several companies make them, but the most hyped by far is EEStor. EEStor's ultracapacitors are set to power the ZENN City Car, an electric car with a 250-mile range that's supposed to arrive next year.
The upper limit of energy storage by batteries is set by the laws of chemistry and we've pretty much maxed that out. In order to provide a real energy storage breakthrough super capacitors need to store significantly more energy than current batteries.
Your dirty hands can harbor millions of germs, but simply washing your hands with regular soap—making sure you vigorously rub them together for 30 seconds—will slough enough microbes down the drain to cut that number to the tens of thousands.
Popular Science needs to stop giving credence to the idea that anti-bacterial agents create "super" bacteria. People need to understand how natural selection works. When we do anything, even washing with ordinary soap, that impedes the bacteria's reproduction we create selection pressure that drives the bacteria to evolve around obstacle. However, the selection pressure only creates an evolution change for that obstacle. Nothing else in the bacteria changes except by random chance. For example, using triclosan only creates pressure to evolve a resistance to triclosan. It doesn't otherwise make the bacteria more lethal. Over the last century our practice of washing with ordinary soap has not made bacteria more lethal, it has merely forced them to evolve a better means of surviving in a soapy environment. If triclosan isn't actual effective against bacteria it won't have any evolutionary effect on them at all.
As if fast food and TV werent enough to make and keep us fat, a new study from the University of Western Ontario has found that our fat may also be making us fat. Neuropeptide Y (NPY) is an appetite-stimulating hormone produced by our brains, which is responsible for a lot of our drive to eat. Scientists had previously thought that overweight people simply had more NPY flowing from their heads than they needed. As it turns out, the UWO study found that not only do our brains produce NPY, but our abdominal fat makes it as well.
This makes sense from an evolutionary perspective. In nature, fat is a good thing. When food is abundant, the body would need a mechanism to drive the individual to eat beyond the point of immediate satiation. Otherwise, it couldn't take advantage of a temporary plethora of food to pack on a surplus for lean times. The body would need some kind of sensor for food abundance and fat would serve this purpose by serving as an automatic measure of calorie input and output. When input exceeds output, more fat gets created. The fat then secretes the neuropeptide Y signaling the behavioral centers that excess food is available. The mechanism fails to be adaptive only in our profoundly unnatural state of overwhelming food abundance.
When there is only one skull to study and at least 65 scientists studying it, you bet there will be squabbling. Ive been following the scientific news of the diminutive Flores hominids—the meter-high beings with brains the size of an orange—ever since the astonishing fossils were first discovered on the Indonesian island in 2004. Recently, three new papers have emerged, and now things are really getting weird.
There is a precedent for the hobbit to be both a new species and a victim of a pathology. One of the first Neanderthals skeletons found belonged to an old male later shown to have suffered from severe arthritis. His hunched posture, enlarged joints and knurled hands became the template for 50 years of scientific illustration about prehistoric humans. Indeed, the common conception of "caveman" comes from that one fossil. Hobbits might be some already known species of humanoid but be afflicted with some disease.
Stay up to date on the latest news of the future of science and technology from your iPhone with full articles, images and offline viewing
Featuring every article from the magazine and website, plus links from around the Web. Also see our PopSci DIY feed
Share links with friends, comment on stories and more
In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.
Check out the best of what's new here.