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California Clearing Lake Of Northern Pike Fish With Poison

Northern pike (Esox lucius) are a nonnative invasive fish species that threaten California's aquatic resources. The creeks flowing into Lake Davis are being treated with a liquid rotenone formulation, CFT Legumine, in a new attempt at eradicating the invasive northern pike from Lake Davis.

Cave Records Provide Clues To Climate Change

Growing inside the caves of the tropical Pacific island of Borneo are some of the keys to understanding how the Earth's climate suddenly changed - several times - over the last 25,000 years. Using evidence from stalagmites, researchers found that the tropical Pacific may play a much more active role in historic climate change events than was previously thought.

Do Migratory Birds 'See' The Magnetic Field?

A visual pathway links brain structures active during magnetic compass orientation in migratory birds. Every year millions of migratory birds fly towards their wintering quarters and come back in next year´s spring to breed. Behavioral experiments have shown that the Earth´s magnetic field is the main orientation cue on their journeys. Nevertheless, surprisingly little is known about the...

Engineered Eggshells To Help Make Hydrogen Fuel

Engineers have found a way to turn discarded chicken eggshells into an alternative energy resource. The patented process uses eggshells to soak up carbon dioxide from a reaction that produces hydrogen fuel. It also includes a unique method for peeling the collagen-containing membrane from the inside of the shells, so that the collagen can be used commercially.

Enzyme's Second Messenger Contributes To Cell Overgrowth

Scientists have uncovered a novel pathway by which hormones elevated in inflammation, cancer and cell injury act on cells to stimulate their growth. Many intracellular signaling proteins work as molecular "switches." The reception of a signal activates them and causes them to pass the signal through the cell, after which they can be switched off until another signal is received.

Forests Of Endangered Tropical Kelp Discovered

Forests of a species of kelp previously thought endangered or extinct in deep waters near the Galapagos Islands has just been discovered. This discovery has important implications for biodiversity and the resilience of tropical marine systems to climate change.

Impact Of Arctic Heat Wave Stuns Climate Change Researchers

Unprecedented warm temperatures in the High Arctic this past summer were so extreme that researchers with a climate change project have begun revising their forecasts. From their camp on Melville Island last July, where they recorded air temperatures over 20ºC (in an area with July temperatures that average 5ºC), the team watched in amazement as water from melting permafrost a meter below ground...

Life-giving Rocks From A Depth Of 250 Km

If our planet did not have the ability to store oxygen in the deep reaches of its mantle there would probably be no life on its surface. This is the conclusion reached by scientists who have subjected the mineral majorite to close laboratory examination. Majorite performs an important function as an oxygen reservoir. Near the Earth's surface the mineral breaks down, releasing oxygen, which then...

Magellanic Clouds Are First-Time Visitors

The Large Magellanic Cloud and Small Magellanic Cloud are two of the Milky Way's closest neighboring galaxies. For hundreds of years, these galaxies were considered satellites of the Milky Way, gravitationally bound to our home galaxy. New research shows that the Magellanic Clouds are recent arrivals on their first visit to the Milky Way's neighborhood.

MicroRNA Convicted Of Triggering Metastasis

While past studies have shown that some microRNAs cause normal cells to divide rapidly and form tumors, this one offers proof that a microRNA can also cause tumors to metastasize. It establishes an important new role for a class of RNA molecules whose significance was discovered only recently.

Music Training Linked To Enhanced Verbal Skills

Music training, with its pervasive effects on the nervous system's ability to process sight and sound, may be more important for enhancing verbal communication skills than learning phonics, according to a new study. Musicians use all of their senses to practice and perform a musical piece. They watch other musicians, read lips, and feel, hear and perform music, thus, engaging multi-sensory skills....

New Drug Makes Weight Loss Safer, Study Suggests

More than 60 percent of American women are overweight, with nearly a third falling into the category of obese and at greater risk of cancer, heart disease and diabetes. Until now, there has been no safe, long-term medical remedy that tackles unwanted weight gain. Now, a well-known drug used to treat vertigo has been adapted for a new purpose: to treat obesity. The vertigo drug has been in use for...

New Keys To Keeping A Diverse Planet

Human activities are eliminating biological diversity at an unprecedented rate. A new study offers clues to how these losses relate to one another -- information that is essential as scientists and land managers strive to protect the remaining natural variation.

North America's Northernmost Lake Affected By Global Warming

The continent's northernmost lake is being affected by climate change. Life in Ward Hunt Lake, located on a small island in the Canadian Arctic, has undergone major transformations within the last two centuries. The speed and range of these transformations suggest that climate change related to human activity could be at the source of this phenomenon.

Promising Genetic Therapy Uses RNA Interference

Researchers have demonstrated the safety of a promising type of genetic therapy that could lead to treatments for a wide range of diseases such as cancer. The research focuses on RNA interference, or RNAi, a key part of the body's genetic machinery. RNAi works by using short strands of RNA to block the expression of specific genes.

Saltwater Crocodiles Can Find Their Way Home

Three crocodiles relocated from their homes in Far North Queensland have been tracked swimming between 10 and 30 kilometres per day. One relocated crocodile swam around the northern tip of Australia to reach home -- covering more than 400 kilometres in 20 days.

Saving Microscopic Threatened Species

The Smithsonian's National Zoo recently acquired 12,000 new animals -- microscopic Elkhorn coral larvae harvested by National Zoo scientists in Puerto Rico -- as part of an international collaborative program to raise the threatened species. National Zoo scientists hope to one day return the animals, once they are grown, to their wild ocean habitat.

Single Molecule Based Electronic Components Modelled

Researchers have created the best method so far of assembling wire-like structures only a single molecule wide, a significant step in science's increasing attempts to reduce the circuitry size of electronic devices to the single molecule scale and provide smaller, faster, and more energy efficient electronics.

Sodium Loses Its Luster: A Liquid Metal That's Not Really Metallic

When melting sodium at high pressures, the material goes through a transition in which its electrical conductivity drops threefold. Usually when a solid melts, its volume increases. In addition, when pressure is increased, it becomes increasingly difficult to melt a material. However, sodium tells a different story. As pressure is increased, liquid sodium initially evolves into a more compact...

Thriving Hybrid Salamanders Contradict Common Wisdom

A new study not only has important findings for the future of California tiger salamanders, but also contradicts prevailing scientific thought about what happens when animal species interbreed. They found that more of the hybrid young survived in the wild than did young of the native or the introduced species -- quite a surprise, since animal hybrids are usually less fit than their parents...