Taming the Butterfly

A "bionic" leg designed for people who have lost a lower leg is undergoing clinical trials sponsored by the US Army. The researchers hope the leg will be able to learn the patient's nerve signal patterns and be able to move in response to the patient's own muscles and nerves.

Klineberg said that as a city at the forefront of the country's demographic revolution, Houston offers a glimpse into America's future, and the survey's assessment of the city may offer important lessons for strengthening the rest of the country: create policies that moderate the inequalities, nurture a far more educated workforce, develop cities into environmentally and aesthetically appealing destinations, and empower all members of a multiethnic society.

A class of engineered nanoparticles -- gold-centered spheres smaller than viruses -- has been shown safe when administered by two alternative routes in a mouse study led by investigators at the Stanford University School of Medicine. This marks the first step up the ladder of toxicology studies that, within a year and a half, could yield to human trials of the tiny agents for detection of colorectal and possibly other cancers.

Though the Arctic is often pictured as a vast white wasteland, scientists believe a thin layer of soot - mostly invisible - is causing it to absorb more heat. They want to find out if that's the main reason for the recent rapid warming of the Arctic, which could have a long-term impact on the world's climate.

People naturally sort words and objects into categories, a key process in forming memory. But when it comes to how things are mentally organized, cultures dramatically differ in their strategies.

Melting glaciers and ice caps on Canadian Arctic islands play a much greater role in sea level rise than scientists previously thought, according to a new study led by a University of Michigan researcher.

Ellen Silbergeld keeps the price of gold posted on the door to her office at the Johns Hopkins Bloomberg School of Public Health in Baltimore. The price is now at a record high (better than $1,500 an ounce) and Silbergeld, professor at Hopkins and editor-in-chief of the journal Environmental Research knows that is really bad news for the Amazon.

One of the most important decisions facing designers of plug-in electric or hybrid vehicles is related to battery choice. Now, researchers at the Norwegian University of Science and Technology (NTNU) have used a life cycle analysis to examine three vehicle battery types to determine which does the best job of powering the vehicle while causing the least amount of environmental impact during its production.

We tend to think of our cell phones as our own person technological domains. They are the places where we can store our digital life and keep an eye on the things that we need to, while we are on the go. But, what if your data is not you own, what if it is used against you in a court of law?

Do you have an embarrassing moment in your past? Did it turn out to be newsworthy? There is a good chance it made it to the Internet and now is forever searchable by Google and the other search engines. Google is being hit with a "Right To Forget" lawsuit in Spain as the country's Data Protection Agency has ordered the Web giant to take down search links on 90 people. According to The Associated Press, Google is fighting five of those lawsuits in Spain's National Court and in January refused Spain's request on all 90 of the claims.

But home robots - dominated by vacuums - make up 55 percent of the company's revenue and are part of the reason iRobot is on a tear. Shares are up 43 percent since the start of the year, and the company earned a profit of $26 million on sales of $401 million last year, up from $3 million on $299 million in revenue the year before. Last week, the company announced it had won a contract to make bomb disposal robots for the Navy.

The University of Connecticut and California State University researchers found that seafloor communities in a restricted fishing area in NOAA's Stellwagen Bank National Marine Sanctuary showed indications of recovery from chronic fishing gear impacts but is not fully stable. The finding is significant because bottom trawlers, dredges and certain gillnets, for example, can alter the ocean floor and benthic ecosystems that provide food and shelter for fish and other marine species.

It's ubiquitous. It's universal. And it's understood-not! Water's choices in a given situation often defy scientific predictions. When expected to bond with other water molecules, it shuns them. When expected to ignore a surface, it becomes deeply attached. However, research at Pacific Northwest National Laboratory has revealed why one of the simplest and most important molecules on the planet makes some of the decisions it does.

The leading international organizations working to protect and manage the world's forests are calling for governments across the globe to increase communities' role in forest management. Doing so could contribute to lifting close to a billion people out of poverty, as well as improve the health and vitality of forests.

In a paper published in Proceedings of the National Academy of Sciences, a group of researchers and scientists show that the gains that have been made in stabilizing CO2 emissions in developed or "rich" countries since the signing of the Kyoto agreement, have been neutralized by the increase in CO2 emissions from developing nations as they produce goods for trade, primarily to developed countries. Because of this disparity, many groups are calling for a change to the Kyoto agreement practice of only counting CO2 emissions that are produced in-country, rather than the CO2 footprint of those products that are consumed.

A group of Cornell-developed, fingernail-sized satellites may travel to Saturn within the next decade, and as they flutter down through its atmosphere, they will collect data about chemistry, radiation and particle impacts.

Researchers from Woods Hole Oceanographic Institution (WHOI) and their colleagues have discovered that massive, swirling ocean eddies -- known to be up to 500 kilometers across at the surface -- can reach all the way to the ocean bottom at mid-ocean ridges, some 2,500 meters deep, transporting tiny sea creatures, chemicals, and heat from hydrothermal vents over large distances.

Dr. Yuri Lvov, professor of chemistry and T.C. Pipes endowed chair in micro and nanosystems at Louisiana Tech University, recently led a symposium at the 241st Conference of the American Chemical Society (ACS), discussing his application of a more eco-friendly and cost-effective nano-material that can be used to significantly improve the properties of plastics, paints and other synthetic composites.

The concept of time as a way to measure the duration of events is not only deeply intuitive, it also plays an important role in our mathematical descriptions of physical systems. For instance, we define an object's speed as its displacement per a given time. But some researchers theorize that this Newtonian idea of time as an absolute quantity that flows on its own, along with the idea that time is the fourth dimension of spacetime, are incorrect. They propose to replace these concepts of time with a view that corresponds more accurately to the physical world: time as a measure of the numerical order of change.

The terse announcement came just after 9:45 p.m. Sunday from Dan Pfeiffer, the White House communications director. "POTUS to address the nation tonight at 10:30 PM Eastern Time," he wrote on Twitter, sharing the same message that had just been transmitted to the White House press corps. According to Brian Williams, the "NBC Nightly News" anchor, some journalists received a three-word e-mail that simply read, "Get to work.