Science and research

Wireless tooth tattoo can detect bad bacteria

Some tech just sounds too good to be true. A removable, wireless sensor that adheres to dental enamel and can detect trace amounts of harmful bacteria just might fall into the too-much-information category for the squeamish among us.

But the silk, gold, and graphene-based sensor that looks a bit like a temporary tattoo could play a key role in detecting and treating various diseases and conditions, the developers at Princeton University say.

"This is a real-time, wireless response from a sensor that can be directly interfaced with a variety of biomaterials," principal investigator Michael McAlpine, an assistant professor … Read more

Last Moment Robot: 'End of life detected'

As a woman lies on a mattress on the floor, a small white machine attached to her outstretched right arm offers the following words:

I am the Last Moment Robot. I am here to help you and guide you through your last moment on Earth. I am sorry that your family and friends can't be with you right now, but don't be afraid. I am here to comfort you. You are not alone, you are with me. Your family and friends love you very much, they will remember you after you are gone.

Jarred by the notion of someone dying in the company of a machine instead of loved ones (or at least other humans)? That's partly the point. … Read more

Venus transit app lets users track the planet's rare voyage

One of the rarest celestial events viewable from Earth will occur Tuesday -- the planet Venus will make a trek across the face of the sun. Such an event has only been observed six times in recorded history, and the next occurrence won't come until 2117, so space buffs are gearing up for the big show.

One way to stay tuned -- and also help scientists record Venus' voyage -- is by using an app called VenusTransit. With this app, which is available on Android and iOS, amateur astronomers can join the ranks of historic explorers like Capt. James … Read more

Scientists help paralyzed rats walk by 'waking up' spinal cords

Paralyzed rats with spinal cord injuries are now walking, running, and even climbing stairs on their way to chocolate rewards thanks to a combination of chemicals and electrical stimulation.

While it remains unclear whether the development in rats will translate to humans, the ability of the rats to voluntarily initiate movement has led researcher Gregoire Courtine to get extremely animated as he describes a profound change in our understanding of the central nervous system.

"After a couple of weeks of neurorehabilitation with a combination of a robotic harness and electrical-chemical stimulation, our rats are not only voluntarily initiating a … Read more

How microbes can build electric grids

How does a microbe know how to share electrons with an inanimate object? A wide variety of microbes can send electrons into, or accept electrons from, conducting materials. Witness the fuel cells that rely on different types of bacteria to exchange electrons with graphite electrodes.

But investigators have wondered how that ability arose. Most organisms internally generate energy by coupling the addition of electrons to one molecule with their removal from another. But some microbes find themselves in circumstances where they must cooperate to generate the energy for life, swapping molecules or electrons with other species. Do these microbes enhance … Read more

Raytheon, Lockheed lock horns for Space Fence contract

Last month, the European Space Agency abruptly declared its Earth observation satellite, Envisat, dead. After more than 10 years of successfully monitoring the planet's natural behaviors from space, the once valuable tool is now considered junk that could endanger active space assets for as much as 150 years.

Situations like this are what has led the U.S. Air Force and partners around the globe to move forward with the construction of a system designed to closely track as many as 200,000 piece of space debris. And now, the Air Force is considering which of two contractors' proposals … Read more

Surgeons use Kinect tech during aneurysm procedures

Microsoft's Kinect has in recent years spawned hundreds of side hack projects. This week, a group of researchers and surgeons out of London is piloting a project developed alongside Microsoft Research to enable touchless viewing and manipulation of images while performing vascular surgery.

During complex aneurysm procedures, a computer program takes a 3D image of a patient's anatomy and produces several 2D images taken from different angles. The Kinect tech then enables surgeons to operate those images using gesture and voice alone.

The benefits are two-fold: surgeons can more easily maintain a sterile environment when they don't … Read more

Earth's atmosphere lights up with airglow in time-lapse video

A little known fact about the Earth is that its atmosphere generates its own light. Lines and clouds in hues of yellow, green, blue, and red reach 60 miles above the surface of the planet.

This light is created in what's known as a chemiluminescent process and is called "airglow" or "night glow," according to videographer and scientist Alex Rivest. "The colors are not reflected light, and not pollution, but rather are light generated from the components in the atmosphere itself," he wrote in a blog post.

Rivest has just released a new … Read more

Take a look through this transparent smartphone screen

Japanese wireless carrier NTT DoCoMo and Fujitsu showed off a sensational prototype device at the 2012 Wireless Japan expo sporting a feature unlike any other on the market today: a transparent dual-sided OLED touch screen smartphone. In other words, science fiction meets reality.

The latest take on the barely there touch screen concept appears slightly more practical than ever before, as one could control the user interface from the front or rear of the phone. For example, one could pull down the notifications bar or select an icon with the unused index finger behind the phone, meaning less finger obstruction over the screen. The prototype shown at the expo featured a 2.4-inch OLED screen (320x240) and used an unidentified version of Android. … Read more