Sunday, April 10, 2011

This Star Trek-Style Scanner Tells If You’re Healthy Or Not



I never thought I would live to see something like this: A hand held scanner that can detect if a patient is healthy or not just by pointing it at the skin. It seems out of Star Trek, but it is real and it works today.

The scanner has been developed over a five-year period by a group lead by professor Jürgen Lademann of the Department of Dermatology, Venereology and Allergy of the Charité-University Medicine in Berlin (and sponsored by the German's Federal Ministry for Education and Research). Right now, it is being tested in Germany using a group of 19-year-old students.

How does it work?
The device—which will have a $280 price tag in Europe—is very simple: Point it at the skin, wait three minutes, and it will tell you how healthy you are in a scale from one (worst) to ten (optimal). The machine produces a light beam that reflects on the skin, analyzes the wavelengths reflected, and processes that information to figure out the anti-oxidants level in the skin. Before this Star Trek-style scanner, doctors needed to get tissue samples and process them in a laboratory to get the same kind of readings.

According to the researchers, the anti-oxidant level in your skin is a good indicator of your overall body health, since it is affected by stress, smoking, alcohol drinking, unhealthy food, lack of sleep and UV radiation. During trial, they were able to detect changes in diet and smoking habits.

The scanner is not designed to detect specific diseases, just your overall health level. It will work for any kind of patients—like cancer patients under treatment, to check out the negative impact of chemotherapy—but the German Government is hoping that it will help people who are not sick to adopt a healthier lifestyle.


Lademan thinks that, by allowing people to measure their health level in a comprehensive way, they will be able to modify their habits and immediately see the results. It sounds like a video game, but according to the ongoing tests, it's working among the students. I would use one, but then again, I'm not going to change my decadent lifestyle, so I prefer to live—and die—in ignorance but happy.

Saturday, April 9, 2011

The Story of the Lonely Whale Will Break Your Heart


Once upon a time, there was a whale called June. Or maybe her name is Margaret. Or Kate. We don't really know. A few nitrogen-hearted scientists call her 52 Hertz just because she sings at a 51.75Hz frequency, but I will call her Alice.

Alice isn't like any other baleen whale. Unlike all whales, Alice doesn't have friends. She doesn't have a family. She doesn't belong to any tribe, pack or gang. She doesn't have a lover. She never had one.

In the immense solitude of the ocean, Alice is completely alone.

The only thing Alice does is sing. Like other whales, she has been singing for a very long time. The first time we heard her song was in 1989, when the hydrophone network of the National Oceanic and Atmospheric Administration recorded her voice for the first time. The researchers at the Woods Hole Oceanographic Institution have been tracking her using these hydrophones for the last two decades.


Her songs—in this recording accelerated by a factor of five—come in groups of two to six calls, lasting for five to six seconds each. But her voice is unlike any other baleen whale. It is unique—while the rest of her kind communicate between 12 and 25Hz, Alice sings at 51.75Hz.

You see, my dear humans, that's precisely Alice's problem. No other whales can hear her. Every one of her desperate calls to communicate remains unanswered. Each cry ignored. And with every lonely song, Alice becomes sadder and more frustrated, her notes going deeper in despair as the years go by.

Nobody knows why this is happening. Nobody knows why Alice is going through the wrong paths instead of following the usual baleen whale's migratory channels. Some think that she might be a weird hybrid, one of a kind. Maybe she—or he, as we don't really know the whale's sex—is the last member of her species. Perhaps there was a mutation. Who knows. Who cares—the explanation doesn't matter.

Whatever the reason is, the sad fact is that there's no happy ending to this tale. Alice keeps roaming the big blue, eating krill, seeing other creatures around her but unable to communicate with any of them. And one day, the NOAA hydrophones will record Alice's unique voice one last time. And again, that farewell cry will get no reply. But it will not matter this time because, at last, Alice would be sad no more.

Thursday, April 7, 2011

The Incredible Story of a Dog Named Wall-E Who Resurrected Himself After Being Put Down


That cute little dog, now named Wall-E, isn't supposed to be alive. He (along with the rest of his littermates) was abandoned in front of a shelter and since the shelter didn't have any room to care for him, was put to sleep.

Wall-E was euthanized twice, with lethal injections to both his heart and limbs, and was pronounced dead after a stethoscope test. They discarded Wall-E and the other dogs in a trash dumpster and moved on.

But! The story doesn't end there. Amazingly, the next day Wall-E wasn't dead. He was somehow resurrected, alive and kicking. Hell, he was healthy as can be, walking around inside the dumpster (his littermates all died) and just doing dog things. An angel dog they called him. A survivor, a fighter and a medical miracle.

Wednesday, April 6, 2011

Did Dr. Richard B. Hoover Just Discover Alien Life?



So the methane organisms discovered in that hostile little lake in California weren't such a big deal after all. No harm, no foul—they were at the very least interesting. Interesting, but nothing like this: Dr. Richard Hoover, as astrobiologist with NASA's Marshall Space Flight Center, claims he's found alien life.

Real alien life. Not weird Earthbound extremophiles or hints of the building blocks of life that are really just errant specks of dust on the lens of a telescope. Life, and not of this Earth.

If Dr. Hoover's paper detailing the find holds up to scrutiny, we can finally, truly say it: We are not alone.

In fact, if Dr. Hoover's paper holds up to the incredibly thorough peer review currently taking place around it, life may in fact be pretty boring and downright common in the grand scheme of the universe.

So what, exactly, did Dr. Hoover find? It's pretty mind-blowing, actually: Contained within nine extremely rare meteorites called CI1 carbonaceous chondrites he discovered what he believes are the fossils of common bacteria that's both similar and nothing like what exists on our planet. In addition to being extremely rare, these meteorites are also some of the oldest in our solar system.

"The exciting thing is that they are in many cases recognizable and can be associated very closely with the generic species here on earth," said Hoover in an interview with Yahoo News. Some of the fossils, however, are quite odd. "There are some that are just very strange and don't look like anything that I've been able to identify, and I've shown them to many other experts that have also come up stump."

More specifically, Hoover claims to have discovered traces of filaments and remnants of algae-like organisms called cyanobacteria. Another find was similar to a bacterium called Titanospirillum velox. They were very Earth-like and unremarkable save for one important difference: They lacked nitrogen.

This caveat is important, as the lack of nitrogen indicates the samples are "the remains of extraterrestrial life forms that grew on the parent bodies of the meteorites when liquid water was present, long before the meteorites entered the Earth's atmosphere," he said.

Hoover is being incredibly open about his paper. As stated above, peer scrutiny has already begun, to the tune of 100 experts who have started dissecting his work in advance of its official publication. A broader, more general invitation was issued to a further 5,000 scientists as well, making this one of the most vetted scientific papers ever. This vetting is a good thing, as Hoover has made claims like this before with other meteorites that ultimately did not pan out.

Should the paper hold up, however, the game is well and truly changed. We are not just "not alone," we are common.

Update: Counterclaims calling the journal a joke and the science suspect have already begun.

Update 2: Bad Astronomy, a blog I read often due to its insightful author and spot-on commentary, debunks this news even more. Sigh.

Tuesday, April 5, 2011

The Devastating Health Impacts of a Nuclear Crisis


The Japanese authorities have announced that radiation levels surrounding the Fukushima Daiichi nuclear power plant are increasing to potentially harmful levels. New Scientist investigates the health risks associated with nuclear power plant explosions.

How do nuclear accidents impact health?


Apart from the damage caused by fires and explosions, accidents also release radioactive materials which can cause radiation sickness. Radiation exposure above a certain threshold, usually only received by workers and emergency teams in a stricken plant, causes acute radiation syndrome within hours of exposure. Depending on the dose of radiation this ranges from skin rashes, vomiting and diarrhoea, to coma and death.

Radiation damages DNA, especially as it assembles in dividing cells. That means tissues which contain many dividing cells, such as the gut lining, skin and bone marrow, are most at risk of damage. High enough doses also damage brain cells and such doses are invariably fatal.

Less severe damage can be treated, however. Gut damage disturbs fluid balance and can lead to blood infection; marrow damage means no blood cells are produced for clotting and fighting infection. If those problems can be managed, people can be kept alive long enough for gut and marrow to regenerate. A cloned human hormone that boosts white blood cell production sometimes helps; there is little else.

Fears of nuclear terrorism have recently inspired more funding for research into new treatments, most aiming to limit cell death in damaged tissues.

What radioactive elements are being released at the Fukushima Daiichi nuclear power plant?

As nuclear cores melt down, reacting nuclear fuel creates many different radioactive elements, all with different toxic effects. Results from previous accidents at nuclear power plants suggest that inert gases such as xenon and krypton are likely to be released, together with iodine-131, two isotopes of caesium, and possibly strontium, tellurium and rubidium.

What effect do these elements have on the body?

Exposure to any radioactive material is bad: the US Nuclear Regulatory Commission assumes that exposure to anything higher than normal background levels increases health risks.

Xenon and krypton are not retained by the body so they have little effect.

Iodine-131 and caesium are more damaging, however. Iodine is actively taken up by the thyroid gland to make hormones. If iodine-131, which emits beta particles, is taken up, this can damage DNA and cause thyroid cancer.

Following the Chernobyl nuclear reactor explosion in Ukraine in 1986, more than 6000 people developed thyroid cancer, probably after drinking contaminated milk as children, according to an investigation by the UN released in February. For unknown reasons iodine-131 does not seem to affect adults.

These cancers can be prevented if children are given pills containing the non-radioactive isotope of iodine soon after exposure. These saturate the thyroid with safe iodine and stop it taking up the radioactive kind. Most children did not get these pills after Chernobyl. They are now being distributed in Japan.

Vast amounts of caesium-137 were distributed across 40 per cent of Europe's surface after Chernobyl. Environmental levels remain elevated in wildlife, with restrictions still in place on eating some sheep farmed in the UK, and game and mushrooms from elsewhere. However, exposure to environmental caesium-137 from Chernobyl has never been linked conclusively to any direct health effects in people, although researchers are divided over whether there is no effect, or just not enough data to say.

How do the nuclear reactor explosions happening in Japan compare to previous nuclear disasters?

The crisis at the Fukushima Daiichi nuclear power plant is the worst nuclear accident since Chernobyl in Ukraine in 1986. However, so far it seems more likely to resemble the Three Mile Island (TMI) accident in Pennsylvania in 1979 which, like Fukushima, lost coolant and had a partial meltdown.

So far, the release of radioactivity at Fukushima appears to be closer to what happened at TMI than at Chernobyl. The huge plume of smoke from Chernobyl spread radiation over most of Europe and forced evacuation within a 30-kilometre radius. The gases that escaped TMI, in contrast, might have travelled as far as New York state, but most stayed within 15 kilometres of the plant.

US authorities have found little evidence of any health damage after TMI. But Joseph Mangano of the Radiation and Public Health Project, a pressure group, claims that deaths from disease have been 26 to 54 per cent higher among young people who were fetuses or babies living downwind of the accident than among local but less exposed people.

He blames the absence of a solid conclusion on poor data on where radionuclides went, and who was exposed to how much. The same arguments will dog Fukushima, unless the data collection is better this time.