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Hickson Compact Group 31 is one of 100 compact galaxy groups catalogued by Canadian astronomer Paul Hickson. Credit: NASA, ESA, S. Gallagher (University of Western Ontario), and J. English (University of Manitoba). Photo No. STScI-PRC10-08a Imagine finding a living dinosaur in your backyard. Astronomers have found the astronomical equivalent of prehistoric life in our intergalactic back yard: a group of small, ancient galaxies that has waited 10 billion years to come together. These "late bloomers" are on their way to building a large elliptical galaxy. Such encounters between dwarf galaxies are normally seen billions of light-years away and therefore occurred billions of years ago. But these galaxies, members of Hickson Compact Group 31, are relatively nearby, only 166 million light-years away.New images of these galaxies by NASA's Hubble Space Telescope offer a window into what commonly happened in the universe's formative years when large galaxies were created from...

Increasing carbon dioxide benefits trees. by Dr. Nitish Priyadarshi Almost 100% of the observed temperature increase over the last 50 years has been due to the increase in the atmosphere of carbon dioxide and other greenhouse gas concentrations like water vapour, methane and ozone.. The largest contributing source of carbon dioxide gas is the burning of fossil fuels. Research says more carbon dioxide more heating of the earth. This is one aspect of the carbon dioxide. Other aspect is its relation with the trees. If we believe on the researches by the scientists, increasing carbon dioxide benefits trees. Scientists from the University of Wisconsin-Madison and the University of Minnesota at Morris have found that increased levels of atmospheric carbon dioxide have led to the rapid growth of certain tree species. The quaking aspen, a popular North America deciduous tree, has seen a 50 percent acceleration in growth over the past 50 years due to increased CO2 levels. Trees are necessary ...