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One Clock With Two Times: When Quantum Mechanics Meets General Relativity
October 20, 2011 — General relativity, the joint theory of gravity, space and time gives predictions that become clearly evident on a cosmic scale of stars and galaxies. Quantum effects are fragile and observed on ... > full story -
Increased Safety Using Simultaneous Techniques for Cardiac Testing
October 19, 2011 — Experts have published an article on the safety of cardiac imaging methods. This study is important for patients worried about radiation exposure during X-ray based studies of the heart. X-ray based ... > full story -
Mobile Electrons Multiplied in Quantum Dot Films
October 14, 2011 — Researchers have demonstrated that several mobile electrons can be produced by the absorption of a single light particle in films of coupled quantum dots. These multiple electrons can be harvested in ... > full story -
Clearing the 'Cosmic Fog' of the Early Universe: Massive Stars May Be Responsible
October 12, 2011 — The space between the galaxies wasn't always transparent. In the earliest times, it was an opaque, dense fog. How it cleared is an important question in astronomy. New observational evidence shows ... > full story -
Why Oxygen Becomes the Undoing of Proteins
October 12, 2011 — Scientists have published a new study explaining why enzymes used for the production of hydrogen are so sensitive to oxygen. They used spectroscopic methods to investigate the time course of the ... > full story -
Suspects in the Quenching of Star Formation Exonerated
October 11, 2011 — Some supermassive black holes power luminous, rapidly growing objects called active galactic nuclei (AGN) that gather and condense enormous quantities of matter. Because astronomers had seen these ... > full story -
X-Ray Camera Makes A-Grade Particle Detector
October 11, 2011 — Combining an off-the-shelf X-ray camera with a thin piece of carbon foil yields a device that can detect high-energy organic atoms and heavy molecules better than the typical devices used for these ... > full story -
Astrophysics and Extinctions: News About Planet-Threatening Events
October 7, 2011 — Space is a violent place. If a star explodes or black holes collide anywhere in our part of the Milky Way, they'd give off colossal blasts of lethal gamma-rays, X-rays and cosmic rays and it's ... > full story -
Crab Pulsar Beams Most Energetic Gamma Rays Ever Detected from a Pulsar
October 6, 2011 — Astrophysicists have detected pulsed gamma-ray emission from the Crab pulsar at energies far beyond what current theoretical models of pulsars can explain. With energies exceeding 100 billion ... > full storyMore: -
Increasingly Precise Data on Radiation Reflected from the Arctic Sea Area
October 6, 2011 — Scientists have developed a new, globally unique method for estimating surface albedo in the Arctic sea area solely on the basis of microwave data. Its advantage over conventional optical methods is ... > full story
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