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Results 41 - 60 of 163.


History / Archeology - Earth Sciences - 28.02.2023
Steel Was Already Used in Europe 2900 Years Ago
Steel Was Already Used in Europe 2900 Years Ago
Team headed by Freiburg researcher has discovered earliest use of steel in Europe - on Iberian stone pillars from the Final Bronze Age A study by an international and interdisciplinary team headed by Freiburg archaeologist Dr. Ralph Araque Gonzalez from the Faculty of Humanities has proven that steel tools were already in use in Europe around 2900 years ago.

Environment - Earth Sciences - 28.02.2023
Invasive plant species will spread even further in Germany
Invasive plant species will spread even further in Germany
They are called giant hogweed, Japanese knotweed or ragweed - but they all have one thing in common: they are invasive plant species that found their way to Germany many years ago and are increasingly displacing other plant species. Many of them have not even reached their potentially suitable habitat yet.

Astronomy / Space - Earth Sciences - 20.02.2023
Unknown Class of Water-rich Asteroids Identified
Unknown Class of Water-rich Asteroids Identified
New astronomical measurements in the infrared range have led to the identification of a heretofore unknown class of asteroids. An international research team including geoscientists from Heidelberg University has succeeded in characterising these small planets using infrared spectroscopy. They are located in the asteroid belt between Mars and Jupiter and are - similar to the dwarf planet Ceres - rich in water.

Environment - Earth Sciences - 15.02.2023
Dangerous Water - Outburst floods from ice-dammed glacial lakes have changed dramatically
Dangerous Water - Outburst floods from ice-dammed glacial lakes have changed dramatically
Glaciers in high mountains can dam lakes, some of which burst out suddenly, posing a hazard to human settlements downstream. To better understand long-term changes of these floods, Dr. Georg Veh and researchers at the University of Potsdam and the Potsdam Institute for Climate Impact Research (PIK) have studied whether and to what extent the activity of these glacial lakes has changed in recent decades.

Environment - Earth Sciences - 09.02.2023
Tree-Ring Data Indicate Unusual Summer Droughts
Freie researchers contribute to new study in "Nature" detailing evidence of unusual drought conditions in Europe in recent years Using data taken from tree-ring isotopes, researchers have proven that the summer droughts that have swept parts of Europe in recent years were actually very unusual in comparison to droughts experienced during the past centuries.

Earth Sciences - Physics - 07.02.2023
Asteroid impact in slow motion
Asteroid impact in slow motion
For the first time, researchers have recorded live and in atomic detail what happens to the material in an asteroid impact. The team of Falko Langenhorst from the University of Jena and Hanns-Peter Liermann from DESY simulated an asteroid impact with the mineral quartz in the lab and pursued it in slow motion in a diamond anvil cell, while monitoring it with DESY's X-ray source PETRA III.

Environment - Earth Sciences - 01.02.2023
Depletion of the ozone layer led to mass extinction
Depletion of the ozone layer led to mass extinction
Palaeobotanists analyse plant fossils 252 million years old 252 million years ago, there occurred the greatest mass extinction in the history of the Earth up to that time: three-quarters of life on land and up to 95 percent of marine species vanished within just a few thousand years. This far-reaching event at the end of the Permian period marked the transition to a new age - that of the dinosaurs.

Earth Sciences - Environment - 18.01.2023
’There are also major deposits of rare earths in Greenland’
Geophysicist Michael Becken on the -Sensational Find- in Sweden and the Involvement of the University of Münster Some observers speak of a "sensational find", others warn against too great expectations. The fact is that a few days ago, experts in Kiruna in northern Sweden found the largest deposit of so-called rare earths in Europe to date.

Life Sciences - Earth Sciences - 11.01.2023
Newly discovered surface structures may affect immune function
Newly discovered surface structures may affect immune function
Freiburg researchers describe a ridge network on the membrane of B lymphocytes for the first time Using new microscopic methods in combination with machine learning-based image analysis, researchers from Freiburg have discovered new structures on the surface of living B cells that affect the distribution and possibly the function of their antigen receptors.

Environment - Earth Sciences - 26.12.2022
Slime for the climate, delivered by brown algae
Slime for the climate, delivered by brown algae
Brown algae could remove up to 0.55 gigatons of carbon dioxide from the atmosphere every year Brown algae take up large amounts of carbon dioxide from the air and release parts of the carbon contained therein back into the environment in mucous form. This mucus is hard to break down for other ocean inhabitants, thus the carbon is removed from the atmosphere for a long time, as researchers at the Max Planck Institute for Marine Microbiology in Bremen now show.

Earth Sciences - 20.12.2022
Using drones to monitor volcanoes: Researchers analyze volcanic gases with the help of ultra-lightweight sensor systems
Using drones to monitor volcanoes: Researchers analyze volcanic gases with the help of ultra-lightweight sensor systems
Composition of gases emitted by volcanoes can provide information on the possibility of imminent eruptions / Lightweight drones make investigation possible even in areas that are difficult to access The main gases released by volcanoes are water vapor, carbon dioxide, and sulfur dioxide. Analyzing these gases is one of the best ways of obtaining information on volcanic systems and the magmatic processes that are underway.

Earth Sciences - 19.12.2022
Sedimentary rock 'chert' records cooling of the Earth over billions of years
Sedimentary rock ’chert’ records cooling of the Earth over billions of years
Research team analyses oxygen isotopes in 550 million-year-old samples Several billion years ago, the oceans were probably not as hot as often assumed, but were instead at much more moderate temperatures. This is the conclusion of a research team from the University of Göttingen and the German Research Centre for Geosciences (GFZ), Potsdam.

Earth Sciences - Environment - 15.12.2022
Tracing the Surface Dynamics of Star Dunes with Laser Scanning
Tracing the Surface Dynamics of Star Dunes with Laser Scanning
Heidelberg geographers use new methods to capture large dune shapes in time and space and to explain their origin Star dunes are among the largest dune formations on Earth and - due to their changing shape over time - they can be important indicators for understanding the effects of climate change. Scientists from Heidelberg University's Institute of Geography have examined such a dune in the Erg Chebbi sandy desert in Morocco by means of state-of-the-art laser scanning.

Environment - Earth Sciences - 15.12.2022
Increasing forest cover in the Eifel region 11,000 years ago resulted in the local loss of megafauna
Increasing forest cover in the Eifel region 11,000 years ago resulted in the local loss of megafauna
Sediment cores obtained from Eifel maar sites provide insight into the presence of large Ice Age mammals in Central Europe over the past 60,000 years / Overkill hypothesis not confirmed Herds of megafauna, such as mammoth and bison, have roamed the prehistoric plains in what is today's Central Europe for several tens of thousands of years.

Environment - Earth Sciences - 08.12.2022
Large mammals disappear from the Eifel region 11,000 years ago as a result of increasing forestation
Large mammals disappear from the Eifel region 11,000 years ago as a result of increasing forestation
Sediment cores from Eifel maars provide information on the development of ice-age large mammals in Central Europe during the past 60,000 years / Overkill hypothesis not confirmed For tens of thousands of years, herds of large mammals such as mammoth and bison roamed the landscape of what is now Central Europe.

Earth Sciences - 06.12.2022
Short-lived Ice Streams
Short-lived Ice Streams
Major ice streams can shut down, shifting rapid ice transport to other parts of the ice sheet, within a few thousand years. This was determined in reconstructions of two ice streams, based on ice-penetrating radar scans of the Greenland ice sheet, that a team of researchers led by the Alfred Wegener Institute, in which the University of Tübingen is also involved, has just presented in the journal Nature Geoscience.

Environment - Earth Sciences - 30.11.2022
Clouds less sensitive to climate than assumed
Clouds less sensitive to climate than assumed
Trade wind cumulus clouds are found on about 20 percent of the globe and cool the planet. Until now, it was expected that these clouds would become fewer due to global warming and thus exacerbate climate change. A team led by Dr. Raphaela Vogel of the University of Hamburg has now been able to disprove this.

Environment - Earth Sciences - 27.10.2022
Iodine accelerates formation of cloud condensation nuclei in the atmosphere
Iodine accelerates formation of cloud condensation nuclei in the atmosphere
International research collaboration shows influence of iodine chemistry on formation of new particles in marine atmosphere and recycling of iodine during particle growth The natural cycling of materials between the biosphere and the atmosphere is of great importance to the Earth's climate system. The best known example is the cycling of carbon between the atmosphere, the land biosphere and the ocean.

Earth Sciences - Environment - 13.10.2022
Seismic sensing reveals flood damage potential
Seismic sensing reveals flood damage potential
Researchers led by Göttingen University use earthquake sensors to track magnitude and velocity of 2021 summer flood Rapidly evolving floods are a major and growing hazard worldwide. Currently, their onset and evolution is hard to identify using existing systems. However, seismic sensors already in place to detect earthquakes could be a solution to this problem.

Environment - Earth Sciences - 21.09.2022
Improved air quality accelerates global warming in recent decades
Improved air quality accelerates global warming in recent decades
An international research team led by Leipzig University has used satellite data to demonstrate that concentrations of pollutant particles have decreased significantly since the year 2000. This is necessary due to their impact on health. But it is also of great significance for another reason, since it has reduced the particles- cooling effect on the climate.