World’s largest, strongest spider webs

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This massive spider web in Madagascar was woven by Darwin’s bark spider, a recently-discovered arachnid that uses its incredibly-strong silk, ten times tougter than Kevlar, to make the world’s largest webs. These spiders are known to make orb webs in Andasibe-Mantadia National Park up to 2.8 meters square anchored by 25-meter threads. More photos at National Geographic, and the scientists’ reports in PLoS ONE.


How to record the cops

How to record the cops: “Radley Balko says, ‘My Reason.com column this week looks at the range of cameras, software, and other technology available for citizens interested in recording on-duty police officers.’

Qik and UStream, two services available for both the iPhone and Android phones, allow instant online video streaming and archiving. Once you stop recording, the video is instantly saved online. Both services also allow you to send out a mass email or notice to your Twitter followers when you have posted a new video from your phone. Not only will your video of police misconduct be preserved, but so will the video of the police officer illegally confiscating your phone (assuming you continue recording until that point).

Neither Qik nor UStream market themselves for this purpose, and it probably would not make good business sense for them to do so, given the risk of angering law enforcement agencies and attracting attention from regulators. But it’s hard to overstate the power of streaming and off-site archiving. Prior to this technology, prosecutors and the courts nearly always deferred to the police narrative; now that narrative has to be consistent with independently recorded evidence. And as examples of police reports contradicted by video become increasingly common, a couple of things are likely to happen: Prosecutors and courts will be less inclined to uncritically accept police testimony, even in cases where there is no video, and bad cops will be deterred by the knowledge that their misconduct is apt to be recorded.

How to Record the Cops: A guide to the technology for keeping government accountable


Four reasons why high-fructose corn syrup is probably not the Devil

Four reasons why high-fructose corn syrup is probably not the Devil: “church+lady.jpg

I’ve been curious for a while now about the proven differences—or lack thereof—between current boogeything high-fructose corn syrup and sugars, in general. I haven’t had a chance to do any heavy reporting on the subject, but, the more of other people’s reporting I read, the less worried I am about the stuff. Here’s a few of the key things I’m learning:

1) Diets high in sugars—all and any kinds of sugars—are bad for you. If high-fructose corn syrup is a bigger problem than other sweeteners, it’s because the stuff is so cheap that it enabled food companies to add delicious, delicious sweetener to all kinds of things that might not otherwise have contained it. But that’s a function of economics, not chemistry. In fact, high-fructose corn syrup isn’t the only “added sugar” in use. It makes up about half the added sugars in processed foods. The others—beet sugar, cane sugar, etc.—still rack up calories and are still no good.

2) Sugary beverages are a key factor in rising obesity rates. They happen to be sweetened, usually, with high-fructose corn syrup. But, again, that’s because it’s the cheapest sweetener. It’s probably not the specific sweetener that’s the problem here, but the fact that Americans drink a lot of sugary beverages. We’d be seeing a problem from over-consumption even if the sweetener was sugar.

3) The few studies that have turned up evidence for corn-syrup specific weight gain have had inconsistent results. Other studies have demonstrated potential health problems linked to consumption of fructose compared to other forms of sugar—but fructose isn’t something that’s specific to high-fructose corn syrup. In fact, high-fructose corn syrup has less fructose than a lot of other sweeteners. We only call it “high-fructose” because it’s got a higher fructose-to-glucose ratio than straight-up corn syrup.

4) One of the sweeteners that has way more fructose than high-fructose corn syrup: Agave nectar. It’s somewhere between 70% and 87% fructose, while most of the high-fructose corn syrup you’ll run into is only 55% fructose. Other natural sweeteners, like honey and apple sugar, are also in the range of around 50% fructose. There’s no solid evidence that shows this fructose to be any different than the fructose in high-fructose corn syrup. If you’re really concerned about fructose (And I’m not sure you should be yet. Most of those studies are dealing with pure fructose in test tube or animal research, not real-life mixtures of sugar in human bodies.) your best bet may be maple syrup, which is only 1% fructose.

My take: Keep an eye out for added sugars—of all kinds—in products. If you’re worried about empty calories and weight gain, that’s your real concern. But don’t stress too much about this. Cutting down on the added sugars in your life is good. But a little added sugar isn’t going to kill you. And high-fructose corn syrup isn’t more of a worry than any other sweetener.

Where am I getting this from?

Science Based Medicine: Corn Syrup: Tasty Toxin or Slandered Sweetener?

New York Times ‘Well’ Blog: In Worries About Sweeteners, Think of All Sugars

Slate: Dark Sugar

The Journal of Nutrition: The State of Science on Dietary Sweeteners Containing Fructose: Summary and Issues to Be Resolved

American Medical Association: REPORT 3 OF THE COUNCIL ON SCIENCE AND PUBLIC HEALTH—The Health Effects of High Fructose Syrup, Executive Summary (PDF)

Junkfood Science: The Science of Sweets


Redesigning Sukkot in New York City

Redesigning Sukkot in New York City: “ Arts Articles 10 09 Sukkah Images 5

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As part of the Jewish harvest festival of Sukkot, many Jews build sukkot, huts that are reminders of the ancient Israelites’ nomadic dwellings. My friend Josh Foer of Atlas Obscura co-organized a design competition in New York City to radically re-imagine these temporary structures while still following the traditional design and ritual constraints. Twelve finalists will build their high-concept sukkot in Union Square on September and 19 and 20. The ‘People’s Choice’ winner will then be on view until October 2. All of the amazingly creative, avant-garde designs can now be viewed on the Sukkah City site. Seen here at top left is ‘Gathering,’ by Dale Suttle, So Sugita, and Ginna Nguyen, New York. Top right is ‘Fractured Bubble‘ by Henry Grosman and Babak Bryan. Below those two finalists is one of the 600 entries, titled ‘Hashkiveinu,’ from my architecture student nephew Ari Pescovitz, Kyle Campbell. and Chad Gleason. I’m admittedly biased, but I dig their idea to use CNC machining and prefabrication to make their sukkot a kit. Congratulations all who entered! I’d be thrilled to enjoy a harvest meal in any of these marvelous shelters.

Sukkah City

Sukkah vs. Sukkah(New York Magazine)


Babbage-esque mechanical computer chip

Babbage-esque mechanical computer chip: “Over at Submitterator, markarayner informs us that engineers at Case Western Reserve University developed a mechanical version of a key component of digital circuits for computers. Their mechanical inverter, the basis for many logic gates, is built from nanoscale levers instead of the transistors patterned onto traditional chips. The research was funded by the US Defense Advanced Research Projects Agency (DARPA) who are after electronics that aren’t prone to failure under high heat, like that inside a jet or rocket engine control system. Te-Hao Lee and colleagues published their work in the current issue of the journal Science. From New Scientist:


Like a telegraph operator’s Morse key, these levers physically make and break contact to pass or block currents.

Application of a voltage makes the levers move under electrostatic attraction. At 550 °C Lee’s team managed to get the inverter to switch on and off 500,000 times a second – performing a computation with each cycle. The faster the switching speed, the zippier the computing. Lee predicts that switching speeds of a billion times a second (1 gigahertz) are possible. That might not sound fast by the standards of desktop PCs, which often run at speeds in excess of 2.5 gigahertz, but for control system applications it’s more than adequate.

‘Steampunk chip takes the heat’