New evidence indicates biggest extinction wasn't caused by asteroid or comet
...hink temperatures rose to a critical point. It got hotter and hotter until it reached a critical point and everything died," Ward said. "It was a double-whammy of warmer...Woods Hole Research Center plans controlled burn in Amazon rainforest
.... The expectation is that the second fire will be hotter and more damaging than the first due to the increased volume of fuel available from those trees that perished in the first fire, and the fact that this fuel will be very dry. Center scientists are also curious to see how those trees that have resprou...Hot-spring bacteria flip a metabolic switch
...ch organisms could fix nitrogen--especially in the hotter regions of the mat. "The cyanobacteria are true mu...ther N2 fixation was critical for organisms in the hotter regions of the mat. Because heat tolerant, single-celled cyanobacteria like Synechococcus specialize...New study explains why hotter is better for insects
...rowth rates," says Frazier, "our data suggest that hotter is better. We see little evidence of evolutionary compensation." This research suggests that adaptation to warmer or to colder temperature inevitably alters the population dynamics of insects, a result that has important consequences for agricultu...Home, home on the range: How much space does an animal really need?
...umn and winter. "Yet, if it rains less or it is hotter than usual, the animals range over wider or smaller areas, depending on the habitat they are in," adds Novella Franconi (Universita de Siena). The method can be applied for facilitating comparisons across populations and species. "This is not only...Global warming to be addressed at public forum
...sts anticipate that the world is going to become a hotter place. Weather is likely to be more severe and less predictable. Some regions will see increased precipitation and flooding, while others will experience more intense droughts. Glaciers and ice sheets will continue melting, and sea levels are expecte...Reduced body temperature extends lifespan in study from the Scripps Research Institute
... can fool it into thinking that the entire room is hotter so that the air conditioning turns on, the Scripps Research team reasoned that they could reset the brain's thermostat by producing heat nearby. To do so, they created a mouse model that produced large quantities of uncoupling protein 2 in hypocre...From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea
...ively moderate temperatures of 59 C (38 F) than at hotter vents where the thermometer reached 94 C (201 F). Climate change Three AGU presentations will focus on surprising new findings about the significant impact of archaea on global climate and nutrition. In recent years, scientists have discovered ...Microbe fixes nitrogen at a blistering 92 degree Celsius
...rogen to revert to its gaseous form. Venting water hotter than 30 C contains very little nitrate so organisms in areas where the subseafloor temperatures are higher would lack nitrogen in a form they can use. The discovery of FS406-22's nitrogen fixing capabilities at 92 C, therefore, widens the realm of wh...Fires fuel mercury emissions, University of Michigan study finds
...se as global warming makes some parts of the world hotter and drier, said Blum, who is the John D. MacArthur Professor of Geological Sciences and director of Camp Davis. The findings also have implications for forest fire management, Biswas said. "When you let fires run free in an area where they have be...... In fact, large cities can be more than 10 degrees hotter than their surroundings. These metropolitan hot spots, which scientists refer to as urban heat islands, can stress the animals and plants that make their home alongside humans. Until recently, biologists had focused so much on the effects of global c...Build parks to climate proof our cities
...g to the sea. "By the 2080s, our summers will be hotter and drier but winters are predicted to become wetter," said Dr Ennos. "An extreme wet winters day by the 2080s will deliver almost 50% more rain than is currently experienced. "Based on an existing model, we have calculated that these more powerful...Colorado River streamflow history reveals megadrought before 1490
...cent report that the southwestern U.S. will become hotter and drier as the climate warms. Co-author Connie A. Woodhouse said, "We have natural variability that includes this time in the 1100s. If we have warming it will exacerbate these kinds of droughts." The newly documented droughts "could be an anal...HIV in breast milk killed by flash-heating, new study finds
...nheit (72.9 degrees Celsius), and typically stayed hotter than 132 degrees Fahrenheit (56 degrees Celsius) for more than six minutes. Viral analysis of the flash-heated and unheated breast milk found that cell-free HIV had been inactivated in all of the heated samples. The researchers note that they use...Magnetic field uses sound waves to ignite sun's ring of fire
... sun's chromosphere (and the corona above) is much hotter than the visible surface of the star. "It's getting warmer as you move away from the fire instead of cooler, certainly not what you would expect," said McIntosh. "Scientists have long realized that observations of solar magnetic fields are the keys...