Caption: UW-Madison student Richard Becker samples rock near Lago Buenos Aires, Argentina. Samples of quartz-bearing rock from boulders deposited thousands of years ago by ice age glaciers in South America are providing scientists with clues to ancient climate and natural global climate change.
Photo by: courtesy Daniel Douglass
An answer to the long-standing riddle of whether the Earth’s ice ages occurred simultaneously in both the Southern and Northern hemispheres is emerging from the glacial deposits found in the high desert east of the Andes.
Using a new technique to gauge the effects of cosmic rays on minerals found in boulders carried by South American glaciers thousands of years ago, a group of scientists from the University of Wisconsin-Madison has demonstrated that the Earth’s most recent ice ages were global events, likely driven by change in the atmosphere.
The work, reported in the current (March/April) issue of the Geological Society of America Bulletin, a leading earth science journal, is important because it reveals that ice ages were global in nature, a fact scientists had trouble determining due to the difficulty of precisely dating the jumble of debris - sand, gravel, clay, boulders - that ice age glaciers leave in their wakes. The new work suggests that ice ages were worldwide phenomena due, in part, to the sluggish redistribution of solar energy through the world’s oceans punctuated by repeated, rapid cooling of the Earth’s atmosphere.
Monitoring lava lake levels in Congo volcano
16.05.2018 | Seismological Society of America
Ice stream draining Greenland Ice Sheet sensitive to changes over past 45,000 years
14.05.2018 | Oregon State University
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...
A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
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18.05.2018 | Information Technology
18.05.2018 | Information Technology