American State

According to scientists, the study will give a clearer idea of what climate change can be expected with accumulation in the atmosphere of carbon dioxide caused by industrial human activities. Because of global warming are less migratory birds fly south for winter spent watching the life of the Pacific black geese in Alaska, biologists have concluded that these birds have in recent years rarely solved on long flights for the winter to the shores of the Gulf of California. This behavior of birds, scientists explain the fact that now the climate in Alaska has become softer, and the once barren lagoon of the American State each year become more and more attractive: the winter is getting warmer, start grow plants that can feed the birds in winter. Over the past 30 years the number of geese who have refused to trip south increased from 4 to 30 thousand, and it is about 30% of the population of this species of birds. Warm weather in the area of habitat geese has reduced the amount of ice, there was more food for birds in the form of sea grass. The warming of the planet forcing birds to abandon long-distance flights for the winter in warmer climates.

In addition, as they note, wintering in the north, the birds may return earlier than the other to breeding grounds, and consequently, faster raise offspring. Confirmation – increasing brood of birds remaining in the winter in Alaska. Scientists offer to turn the Sahara into a tropical forest researchers presented a new project to combat global warming which involves the conversion of the Sahara desert to tropical forest.

A New Class Of Black Holes

New data obtained by X-ray Observatory Chandra and XMM-Newton, confirm that there are two medium-size black hole in our neighboring galaxy. These holes, so far managed to avoid falling into the galaxy center. They can be example of the "seeds" from which are formed supermassive black holes in galactic centers, including the Milky Way. For several decades, scientists have strong evidence for the existence of two different classes of black holes, holes with a mass of magnitude, about 10 solar masses of supermassive located in the centers of galaxies, whose mass varies from hundreds of thousands and up to billions of solar masses. But is there a black hole intermediate-mass? The mystery still remains unsolved.

Evidence for the existence of these objects was controversial, and there was no convincing arguments that there are intermediate black holes in the galaxy. Recently, a group researchers found in X-ray data, the signature of medium-mass black holes in the galaxy M82, located 12 million light miles away from Earth. "This is the first discovery of two black holes, the average weight in one galaxy, "says Hua Feng of Tsinghua University in China. Scientists led two papers describing the results of the study. "Their location near the center of the galaxy may contain information about the origin of large, supermassive black holes at the centers of galaxies. " One possible mechanism for the formation of supermassive black holes, suggest a chain reaction of collisions of stars in compact star clusters that leads to the accumulation of very massive stars that are in the process of decay, forming a black hole intermediate-mass.