A Double Chamber Bike Tire Helps Prevent Flats When You Ride Off-Road

Those big chunky tires used on mountain bikes don't just help plow through rough terrain and absorb shocks. When under-inflated, they also have a much larger footprint for extra grip on uneven surfaces—but there's a tradeoff. When an impact compresses the inner tube too far it can cause what's known as snake bite punctures, an all too common problem faced by bikers that a new double-chambered tire might solve.

As the double valves indicate, the new tire—jointly developed by Schwalbe and bike accessory maker Syntace—features a chamber next to the rim which can be pumped up to higher pressures, preventing it from squishing to the point of puncturing. And it sits next to an outer chamber that can be inflated to lower pressures, so it's able to spread out for improved traction and compress better over bumpy terrain.

The tire—which is still being perfected and will hopefully be available later this year—is an improvement to the tubeless design that's often used in off-road wheels. Previous tubeless tires could be inflated to low pressures with less of a risk of impact punctures, but it also increased the chances of the tire popping off the rim. Since the higher-pressure inner chamber hugs the rim with this new design, that shouldn't be a problem. More here.

Hack a 3D Printer Into a Surprisingly Skilled Air Hockey Robot

Good news for anyone who dropped a small fortune on a 3D printer and found themselves bored of creating novelty keychains and meme-based figurines. Jose Julio successfully turned the parts needed to build a RepRap 3D printer into an air hockey-playing robot that looks pretty tough to beat.

If your roommates or family straight-up suck at air hockey and you want a real challenge, Jose has posted detailed build instructions here, as well as 3D models and requisite software here. The usual caveats apply in terms of having some pre-existing level of skill to build your own—this isn't like putting together a Lego kit—but the good news is that you can probably turn it back into a 3D printer to fix or replace whatever it is you smash after continuously losing.

Great, Hackers Can Use Snapchat to DoS Attack Your Phone

When it comes to security, this hasn't been Snapchat's year. First hackers leaked a massive amount of private user data; then we discovered how dumb easy it is to circumvent Snapchat's anti-robot feature. Now, cyber security researchers have shown that Snapchat can be used to launch a denial-of-service attack that freezes your smartphone, according to the L.A. Times.

Security expert Jaime Sanchez showed the L.A. Times how Snapchat's flawed security system allows hackers to reuse encryption tokens to blast individual users with thousands of messages in a matter of seconds. The tidal wave of messages causes iPhones to freeze and restart; Android devices don't fully reboot, but slow down significantly, preventing users from doing anything else through Snapchat until the thousands of messages have been processed.

Reusing identity tokens could allow spammers to send massive amounts of messages to thousands of users, or launch a focused attack on a single user.

When the L.A. Times contacted Snapchat, the app company wasn't aware of the vulnerability. Given Snapchat's slow response to security alerts in the past, maybe that shouldn't be surprising. More here.

Scientists Say They Can Provide Infinite Power by Harnessing Vibrations

Well, this sounds promising. A team from Singapore's Agency for Science, Technology and Research say they can efficiently harvest enough electricity from low frequency vibrations to power small electronic devices.

The process works thanks to aluminum nitrate, one of several materials that naturally accumulates an electric charge in response to mechanical stress. That property is known as piezoelectricity. The idea of using low frequency vibrations to make electricity like this is not a new one, but this is a big step forward. In the past, scientists believed that the bigger the device, the more electricity could be harvested and could also only use one frequency, limiting the amount of electricity that could be produced significantly. The new approach can use a wide range of frequencies and works in tiny devices, like wireless sensors.

But let's not get ahead of ourselves. It's not like we're going to start lighting our homes with ambient sounds. And despite what the scientists say, it's probably not a good idea to think of the low frequency vibrations approach as a way to get infinite electricity because, well, infinity is a long time. If the technology pans out, though, it could be huge in the fields of wireless and medical technology, though. After all, nobody wants batteries in their body. More here.

This Skiing Backpack Turns Parents Into Sled Dogs

Being a parent isn't always a glamorous job—in fact, it rarely is. But you'll do anything for your kids, including serving as a human sled dog when you're out skiing and your spawn are too tired to forge through fresh powder, thanks to the Snowmule backpack.

Available in 15 and 25 liter capacities, the Snowmule packs can be used to carry a set of skis and a set of poles. And at the bottom of the pack are a set of stashable tow ropes with handles that can be used to pull a couple of 100 pound passengers behind you. It's kind of like water skiing—except it's real skiing, and the speeds are far less exhilarating.

But it should help mitigate the "I'm tired can we go home?" complaints, and that alone will make the $115 (15 liter) and $140 (25 liter) price tags completely worth it. More here.

This Incredible Star Wars-Style Bionic Hand Let an Amputee Feel Again

We geeks all have the same platonic prosthesis ideal: Luke Skywalker's badass Star Wars mech-hand. We're getting there, bit by bit. Dennis Aabo Sørensen's new hand is almost there; it let him feel again.

The hand is the subject of an in-depth paper published in the journal Science Translational Medicine today, and has been tested on Sørensen and Sørensen alone. The mecha-gripper works by tapping right into Sørensen's nerves via electrodes in his arm that are stimulated by sensitive pressor sensors on the hand's fingertips. The result? Touch. Touch that Sørensen says feels an awful lot like what he can get out of his good hand.

Silvestro Micera, a neural engineer at the Scuola Superiore Sant'Anna in Italy and the Swiss Federal Institute of Technology Lausanne in Switzerland, lead the team of researchers responsible for the touchy-feely mitt and considers it "certainly a major step in the right direction."

The catch? Since the study focused on a single person, it's hard to really draw any conclusions about how mechanical hands like these could work on a larger scale. Not to mention there's the issue of using it for long periods of time; Sørensen only used this one off and on.

There's still a lot of work to be done, so you probably won't want to go losing any hands any time soon. Or ever. But for folks who already have, it looks like touchy-feely solutions are just around the corner. More here.

What if famous brands used famous cartoon characters as their logos?

Brilliant. Artist Bruce Yan remixes the logos of famous brands by inserting the cartoon characters we grew up with. So the Playboy bunny becomes a profile view of Bugs Bunny, the mermaid in the Starbucks Logo becomes Ariel, Charlie Brown is the BIC guy and so on. The twists are super clever and fun.

You can actually see more of these logo remixes at Gallery1988 where Yan sells them as prints (sadly, a lot of them seem to be sold out). It'd be great if the brands actually struck deals with the cartoons and did a whole series like this in real life. More here.

How To Turn Dry Pasta Into a Rocket Engine

You may not realize it, but your kitchen is one of the most well-stocked chemistry sets you could ever hope for. And it's not only for creating edible chemical reactions. NASA might rely on giant laboratories and factories to build its rocket engines, but all you need is a piece of pasta, a jar, some hydrogen peroxide, and a little yeast. Oh, and fire.

As long as you're not expecting to a put a human into orbit, this simple experiment will produce a surprisingly satisfying rocket engine on a very small scale. Mixing the hydrogen peroxide and yeast produces a steady flow of oxygen, and the pasta works well as makeshift rocket fuel. And while your creation won't produce much thrust, it still produces a decent flame, so be careful with this one, ok?

Can't Choose Between Biking or Roller Blading? Now You Don't Have To

The Segway opened the floodgates for countless personal mobility devices, with designs that range from conservative to downright crazy. And the Aeyo—a cross between a scooter, a bicycle, and a pair of inline skates—falls somewhere in the middle of that scale.

The Aeyo is ridden in a standing position like a scooter, but instead of kicking off the ground or pedaling for propulsion, your feet are strapped into a pair of what look like inline skates, which are attached to the rest of the contraption with a pair of articulated legs. So a simple skating motion gets the Aeyo rolling, while steering and braking come courtesy of its handlebars. More here.

The Perfect Way to Hold a Hamburger, Proven by Science

We've all been there: You're holding a big ol' hamburger with both hands, you bring it to your mouth to take a bite, and the whole burger falls out all over the place. But guess what, there's an "ideal" way to hold a burger. This is it.


A while back, Japanese television show Honma Dekka!? had three researchers—experts in fluid mechanics, engineering, and dentistry—try to figure out the best way to hold and eat a large hamburger. Apparently, they spent four months researching this. For science.

The researchers did a 3D scan of a hamburger, trying to figure out how the particles interacted while holding a large hamburger. Using the data, they showed that the typical way to hold a burger—thumbs on the bottom and fingers on top—results in pushing the contents of the burger out of the buns.

As you can see, the thumbs and the pinkies are on the bottom. The middle three fingers on each hand are on the top. As you can see the burger is divided visually into equal parts.

If the burger is held uniformly, then its contents shouldn't spill out of the burger's backside.

Note that it's important not to hold the burger too tight. Doing so could cause the buns to be crushed, and the contents to spill out. Also, the dental expert recommended warming up the muscles in your mouth before eating a big hamburger by opening and closing it a few times.

One drawback: If you use the "ideal" way to hold a burger, you probably should eat your fries before or after you finish it. Otherwise, it might be difficult to hold the burger like this and eat fries at the same time. More here.

Scientists Use Acid to Turn Blood Cells into Stem Cells in 30 Seconds

This is a game changer, folks. Whereas mining stem cells has been either an ethical quandary or a months-long affair, scientist can now turn any old blood cells into stem cells in just 30 seconds—by dipping them in acid.

That's right. Take blood cells, add acid, get stem cells. It's as simple as it sounds.

A team of Japanese scientists stumbled upon the method after observing a similar phenomenon in plants, where environmental stress can morph an ordinary cell into an immature one. New plants could then grow from the immature cell. This has also been known to happen in birds and reptiles, so the team from the Riken Center for Developmental Biology set out to see if something similar could happen with mammals.

They started with mice, of course. Sure enough, when they exposed blood cells from mice to acid, a transformation began. While some of the blood cells died, many became stem cells within a couple of days. "It looks a bit too good to be true, but the number of experts who have reviewed and checked this, I'm sure that it is," Chris Mason, professor of regenerative medicine at University College London, told the BBC. "If this works in people as well as it does in mice, it looks faster, cheaper and possibly safer than other cell reprogramming technologies—personalized reprogrammed cell therapies may now be viable." More here.

Cleaning a neglected shower is just about the worst household chore there is. But if you can spare an extra minute after your daily shower, you can eliminate soap scum before it becomes stuck to tiles like super glue by simply wiping down the walls with this handy squeegee, designed to hang on your curtain rod or shower head.

For just $10 you get your choice of a white, blue, or black hanger that's always in reach when you're done cleaning yourself so you can then clean your bathroom. And while it does rob you from an extra minute or two of sleep in the morning, in the long run you're gaining back a Saturday afternoon that would otherwise be sent scrubbing until your arms ached. More here.

Wikipedia's Adding Voice Recordings to Famous People's Biographies

Imagine being able to hear a great historical figure's voice. It would add such richness to the facts and dates about her or his life. Starting today, Wikipedia will make that possible with the Wikipedia Voice Intro Project, adding short voice recordings to the online encyclopedia. And that's truly awesome.

WikiVIP announced the program with a demo recording from British personality Stephen Fry. Apollo 16 astronaut Charlie Duke's page also boasts a voice recording. The project page says it was undertaken "so that we know what notable people sound like; and how they pronounce their own names." A simple, goal, but infinitely profound.

There's something intangibly powerful in the human voice. Curiosity leads us to wonder what great historical figures sounded like—and we get deeply offended if modern portrayals don't fit the sound we imagined. Just ask Daniel Day-Lewis.

If you're the type of person who has a Wikipedia biography, go here to see how you can get your voice saved forever. Just don't sneeze or snort or anything weird—people will be listening to that recording eons from now.

Facebook Could Die Out Like an Infectious Disease By 2017

If you view Facebook as a plague on social dynamics, you might not be far wrong.Researchers from Princeton University claim that the social network's popularity has spread like an infectious disease—but, as we slowly become immune to its charms, it will die out.

By comparing the uptake of Facebook to growth curves of epidemics, the scientists claim that—just like the bubonic plague—Facebook will gradually begin to fade away. They go further than that, too, claiming that Facebook will lose 80 percent of its peak user base within the next three years. The researchers write in a paper currently published on the arXiv servers:

"Ideas, like diseases, have been shown to spread infectiously between people before eventually dying out, and have been successfully described with epidemiological models... Ideas are spread through communicative contact between different people who share ideas with each other. Idea manifesters ultimately lose interest with the idea and no longer manifest the idea, which can be thought of as the gain of 'immunity' to the idea."

John Cannarella and Joshua Spechler, both from Princeton, modelled social networks using equations commonly used to map the spread and recovery of epidemics. They then tested them on data gathered from MySpace to check they accurately modelled boom and crash, and then applied them to Facebook. In turn, they generated the prediction that the site's user count will drop by 80 percent before 2017.

Of course, it's not clear that equations used to model epidemics will accurately predict Facebook's decline—there are so many factors in the possible success or failure of the site that such equation are always bound to simplify the problem. But with Facebook's chief financial officer David Ebersman admitting recently that the site "did see a decrease in daily users, specifically among younger teens" in the last three months, you never know. More here.

These Blossoming Flowers Are the First Inflatable 3D-Printed Object

Most objects created by 3D printers are made from hard rigid plastics, but as the hardware is continually being improved, new materials are coming into play. Believe it or not, at Victoria University of Wellington's School of Design, Richard Clarkson has succeeded in 3D printing these flowers from a soft rubber-like material that can actually be inflated.

As air is pumped into inner chambers, these rubber flowers appear to blossom and open up, revealing a colorful inner core. And while this doesn't mean you'll be printing custom-shaped birthday party balloons anytime soon, it's another innovation that brings 3D printers closer and closer to the replicators that deep down we all actually want. More here.

Scientists Discover Water in Stardust and It Suggests We're Not Alone

Stardust sounds magical enough as it is, but now scientists have for the first time observed that it contains water—which, in turn, could suggest that life is universal.

The water forms within dust grains when they're bombarded with charged winds from the sun. The chemical reaction set up by the winds was hypothesized by scientists in the past, but this is the first time anyone's actually found H2O trapped inside real stardust.

The finding saw John Bradley, from the Lawrence Livermore National Laboratory in California, take a very close look indeed at the outer layers of interplanetary dust particles that were found in the Earth's stratosphere. Incredibly high-resolution microscopy revealed tiny pockets of water in the already-tiny specks of dust—each of which themselves measured less than 25-micrometres, half the width of a human hair. New Scientist explains how the water forms:

The dust is mostly made of silicates, which contains oxygen. As it travels through space, it encounters the solar wind. This stream of charged particles including high-energy hydrogen ions is ejected from the sun's atmosphere. When the two collide, hydrogen and oxygen combine to make water.

Roll the new finding together with the fact that there are plenty of organic compounds in interplanetary dust, and the suggestion is, as New Scientist points out, that stardust contains all the basic ingredients needed for life like that on our planet. Because it's believed that similar stardust grains exists in solar systems throughout the universe, the finding bodes well for the existence of life elsewhere. In other words, we're almost certainly not alone. More here.

New Climate Study Warns of More Frequent El Ninos in the 21st Century

A study published today in the journal Nature Climate Change warns that climate change will cause a dramatic increase in El Nino weather events during the 21st century. Formerly happening once every 20 years or so, we can now expect an El Nino once every 10 years.

An El Nino occurs naturally when the temperature of the Pacific Ocean rises, altering rainfall patterns and causing everything from extreme floods to severe droughts around the world. AsThe Guardian points out, the last severe El Nino (1997-98) caused between $35-45 billion in damage and killed about 23,000 people.

The really scary part is that scientists used to believe that these naturally occurring El Nino events wouldn't be affected (which is to say, made more frequent or more severe) by climate change. This new study suggests that we may not be so lucky.

"This is a highly unexpected consequence of global warming," Professor Mat Collins of the University of Exeter said in a statement. "Previously we had thought that El Nino would be unaffected by climate change. Tropical rainfall conditions such as those experienced in extreme El Ninos have a dramatic influence on the world […] the impact therefore on mankind is substantial."

Climate experts say that more research is needed on the subject, but that things don't look good. You rarely want to hear the word "irreversible" bandied about when you're talking about the future of our planet.

"This is essentially an 'irreversible' climate change phenomenon, and it would take a dramatic reduction in greenhouse emissions over a number of generations to reduce the impact," Collins said in a statement. "It is even more evidence that cutting emissions would be a good idea." More here.

Christophe Claret's Latest Watch Lets You Kill Time By Playing Poker

Christophe Claret's first foray into the seedy world of wristworn gambling was the Blackjack 21 that let deep-pocketed watch aficionados pretend to squander away even more of their fortunes. That was followed by a Baccarat model, and now the company is introducing an even more complicated model that lets up to three players enjoy a quick game of Texas Hold'em Poker.

Christophe Claret actually intended to release this particular model first back in 2011, but the mechanisms required to orchestrate the 52 cards needed for a legit game of Poker required an additional two years of development and refinement. So in addition to cramming an actual working watch inside this piece's 45-millimeter wide case, there's a mechanical card dealer in there too with various components ensuring the results are always random.

To ensure that the three players huddled around the tiny watch can't see each other's cards, Christophe Claret has employed a series of strategically angled shutters keeping other hands out of view. The game plays out through a series of button pushes, and is accented with a series of gongs that are triggered during specific parts of a round. And with an impressive 72 hours of power reserve, you can keep gambling for days without having to worry about giving the Poker a wind.

Only 80 pieces will be produced, 20 in each of four different finishes and colors, and you can probably safely expect it to come with a price tag similar to its predecessor—somewhere in the $200,000 neighborhood. Imagine the weekend you'd have in Vegas for that much money. More here.

You Can Now Buy a Life-Size, 3D-Printed Replica of Your Unborn Fetus

"Imagine holding your baby before he or she is born." It might sound like a morbid thought (if not a shitty horror flick catchphrase), but the idea behind the line is actually pretty sentimental. Of course, that's assuming you'd call 3D printing a life-size replica of your unborn fetus sentimental.

For $600, though, you can hold a keepsake from that very special time in baby's life in your very own hands. Thanks to 4-D ultrasound technology, a company called 3D Babies is offering to turn those flat photos into a custom, three-dimensional, life-size plastic replica of soon-to-be-born fetus

The company originally started as an Indigogo campaign, but they've raised the money for their Stratasys U-Print SE Plus and are ready to pop out fetusdolls as fast as you can make their human counterparts. But even if you're not quite ready for a fetus of your very own, you can always borrow a fetus from someone else. More specifically, you can borrow a fetus from Kimye. Yes, their entire collection of 3D-printed celebrity babies starts and ends at Baby North West. More here.

New Olympic Zipper Technology Makes Seams Nearly Invisible

You won't find it in stores just yet, but if you look closely at the jackets and other gear worn by US, Canadian, and Russian athletes at the upcoming 2014 Olympics, you might catch a glimpse of Columbia Sportswear's new waterproof zipper technology. Or you might not, since it's been engineered to be almost invisible when zipped shut.

Columbia was contracted to design and produce the outfits for those three nations, and according to the folks at GearJunkie, the company took the opportunity to introduce its new waterproof LightRail Zipper technology which it's been developing and perfecting for the past few years. The new zippers are lighter, slimmer, more flexible, and easier to zip than traditional waterproof zippers. And when sealed shut the seams almost completely disappear into garment.

The Lightrail Zippers are bonded to jackets and other garments using laser-cut fabric that works in a similar fashion to adhesive seam tape. But even without the bulk of stitches, there's no chance the seams will ever come undone. Even the zipper itself has been improved, with the addition of a subtle dock that completes the water and windproof seal.

There's no word on when the new zipper tech will be introduced on consumer-ready Columbia jackets and garments, but assuming the uniforms perform admirably at the Olympics, it's safe to assume that we'll probably see it officially rolled out closer to the end of the year. More here.