Climate change and species extinction, two phrases that seem to be on everyone’s mind. But opinions diverge and even if the majority of us can no longer deny climate change – as the signing of the Kyoto agreement by most countries shows – its real dimension and impact on species extinction is still very controversial. But now scientists from Oxford University’s Biodiversity Research Group and colleagues decided to test our capacity to see the future by…going back to the past. And the conclusion is that the most commonly used models to predict species extinction are basically not that good. But not all is bad news.
Where are we going to be in 100 years’ time? The scientific results that reach the public vary so much that we can no longer know what to believe and many times it’s simply our political choices that define our ecological opinion. We are not challenging scientists’ integrity, but how accurate are their forecasting models? The problem is that we cannot go to the future to test their predictions.
But now Miguel B. Araújo, Robert J. Whittaker, Richard J. Ladle and Markus Erhard from the Oxford University’s Biodiversity Research Group, the London’s Natural History Museum Biodiversity Research Group and the Institute for Meteorology and Climate Research in Germany, in a paper just published online in the journal of Global Ecology and Biogeography might have found a solution by approaching the problem in a very different way.
Catarina Amorim | alfa
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Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
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Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
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In an article that appears in the journal “Review of Modern Physics”, researchers at the Laboratory for Attosecond Physics (LAP) assess the current state of the field of ultrafast physics and consider its implications for future technologies.
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The Atlantic overturning – one of Earth’s most important heat transport systems, pumping warm water northwards and cold water southwards – is weaker today than any time before in more than 1000 years. Sea surface temperature data analysis provides new evidence that this major ocean circulation has slowed down by roughly 15 percent since the middle of the 20th century, according to a study published in the highly renowned journal Nature by an international team of scientists. Human-made climate change is a prime suspect for these worrying observations.
“We detected a specific pattern of ocean cooling south of Greenland and unusual warming off the US coast – which is highly characteristic for a slowdown of the...
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