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In the next 20 years, more than 590,000 square miles of land globally - more than twice the size of Texas - will be gobbled up by cities, a trend that shows no signs of stopping and one that could pose threats on several levels, says a Texas A&M University geographer who is part of a national team studying the problem.

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.

Neala Kendall, a graduate student from the University of Washington in Seattle, after studying cannery data on sockeye salmon harvested from Bristol Bay in Alaska, has discovered that the length of the average sockeye caught there, has been dropping for the past half century.

Scientists studying populations of gray wolves in the USA's Yellowstone National Park have developed a way to predict how changes in the environment will impact on the animals' number, body size and genetics, amongst other biological traits.

The fact that the average American home is slowly but surely shrinking - and will most likely continue to do so if and when the country shakes off its current financial woes - isn't exactly revolutionary news. But when members of the National Association of Home Builders (NAHB) were asked earlier this year what they anticipate the new home size will be 2015, it's how they think single-family homes will shrink - which standard features of the average home will disappear to compensate for less square footage and which ones will remain or become more popular - that's the most revealing about the shifting needs and wants of homeowners.

UC Berkeley physicist Richard Muller and others were looking at the so-called urban heat island effect - the notion that because more urban temperature stations are included in global temperature data sets than are rural ones, the global average temperature was being skewed upward because these sites tend to retain more heat. Hence, global warming trends are exaggerated. Using data from such urban heat islands as Tokyo, they hypothesized, could introduce "a severe warming bias in global averages using urban stations." In fact, the data trend was "opposite in sign to that expected if the urban heat island effect was adding anomalous warming to the record. The small size, and its negative sign, supports the key conclusion of prior groups that urban warming does not unduly bias estimates of recent global temperature change."

Microactuators are critical components for industrial applications such as MEMS, micro-medical devices, and microrobotics. However, the fabrication of increasingly sophisticated, millimeter sized microactuators is complicated and proving to be a challenge.

A device the size of a deck of playing cards that can track temperature, humidity, light and barometric pressure is moving from the shipping world to the realm of research to help develop a better understanding of how the climate is changing.

"Photovoltaic solar panels actually start paying for themselves right after installation," says Buzard. He estimates 10 solar panels in 235-watt sizes cost about $14,000 installed; add in a 30 percent federal credit, register for renewable energy credits and you pay for the system in less than 10 years.

Scientists today claimed one of the milestones in the drive for sustainable energy - development of the first practical artificial leaf. Speaking here at the 241st National Meeting of the American Chemical Society, they described an advanced solar cell the size of a poker card that mimics the process, called photosynthesis, that green plants use to convert sunlight and water into energy.

Smartphone apps may be the key to getting people out of their cars and onto mass transit. An interesting study of commuters in Boston and San Francisco found people are more willing to ride the bus or train when they have tools to manage their commutes effectively. The study asked 18 people to surrender their cars for one week. The participants found that any autonomy lost by handing over their keys could be regained through apps providing real-time information about transit schedules, delays and shops and services along the routes. Though the sample size is small, the researchers dug deep into participants' reactions. The results could have a dramatic effect on public transportation planning, and certainly will catch the attention of planners and programmers alike. By encouraging the development of apps that make commuting easier, transit agencies can drastically, and at little cost, improve the ridership experience and make riding mass transit more attractive.

Labeling products with information on the size of the carbon footprint they leave behind could help both consumers and manufacturers make better, environmentally friendly choices.

Containers made from plastics are used in most traditional greenhouse operations. While plastic containers are practical, strong, and can be formed to any size, shape, or color, the extensive use of these petroleum-based containers creates significant waste disposal problems for the greenhouse industry and consumers. One example: a 2008 report found that a typical greenhouse operation in California discards over 3560 pounds of plastic trays, flats, and containers annually.

Researched and designed by technologist Michell Zappa, Envisioning Technology is a speculative and subjective overview of potential future technologies. Based on personal research and observations, this map is intended to facilitate predictions of where the technium is going, as well as provoke thought and stimulate debate. Due to the intrinsic difficulty of speculation, the visualization is not to be interpreted as a roadmap, but rather as a point of reference for those investigating (or designing) the future of technology. Each hub represents an important area of development to which actual technologies (shown as nodes) belong. The center of the map marks where we are today, and the further out points indicate how far into the future each technology is predicted to become mainstream. The visualization also attempts to distinguish the predicted importance of each area, shown by the relative size of the nodes

Magnets made of just three to five atoms will allow for computer storage to shrink millionfold. Now a chemist from University of Copenhagen has discovered a route to workable nano-magnets. The solution? Heavy non-iron metals.