[quote] (E)ach sufficiently dense, compact object in space generates an invisible sphere around it which determines how the laws of physics behave with growing distance. This sphere is a theoretical concept to help us understand the difference between small and big scales, rather than an actual physical membrane.
According to our theory, within this bubble the laws of ordinary Newtonian gravity that we see in our solar system hold for objects interacting with the massive body at the centre. Outside the bubble, the theory suggests that the gravitational pull by the central object can be significantly enhanced – even though there is not more mass present.
The bubble size would be proportional to the mass of the central object.
To our big surprise, our theory allowed us to explain the stellar velocities in galaxies a lot better than with Einstein’s general relativity, which allows for dark matter to exist. So there may actually be less mysterious dark matter out there than we think – and maybe even none at all. [/quote]
Senator Michael Bennet, of Colorado, has held his seat since 2009 and is possibly best known for not talking much. But Ted Cruz just set him off.
Quote: We may finally have found the long-elusive cause of Alzheimer’s disease: Porphyromonas gingivalis, the key bacteria in chronic gum disease. ... the good news is that a drug that blocks the main toxins of P. gingivalis is entering major clinical trials this year, and research ... shows it might stop and even reverse Alzheimer’s.
Last year, the southern Japanese city of Susaki created a position — honorary tourism ambassador — for a real-life otter with a large social media following.
So far, so cute.
Then Chiitan, an unsanctioned mascot based on the otter, began staging dangerous and non-child-friendly stunts around town, like swinging a weed whacker and tipping over a car...
Inspired by JR’s large?format street "pastings", INSIDE OUT gives everyone the opportunity to share their portrait and make a statement for what they stand for. It is a global platform for people to share their untold stories and transform messages of personal identity into works of public art.
A new levitation device uses ultrasonic speakers to create sound fields that can trap particles in midair. Unlike other devices that also use sound radiation to manipulate matter, the new system can move several objects in different directions at once . This kind of levitation technology, described online the week of December 17 in Proceedings of the National Academy of Sciences, could assemble microelectronics or maneuver small objects inside the body for medical treatment.
The past year saw tremendous advancements in humanity’s capacity to explore space, and 2019 promises to be no different. From mysterious Kuiper Belt objects and Martian probes to historic rocket launches and daring efforts to touch the Sun, here’s what the next 12 months have in store.
Based on high resolution images from the ESA Mars express and NASA orbiter HiRise cameras, this paper gives new in-depth analysis of the remarkable geometric distribution of certain "mounds" or hill-like features in the Cydonia region of Mars. It validates the earlier measurements obtained using the lower resolution NASA Viking images, which hinted strongly at artificial surface interventions and adds new information regarding the geometry.
Virgin Galactic's supersonic space plane soared into the upper reaches of Earth's atmosphere Thursday (December 13) for a milestone test flight. It indicates the company is not far off from sending tourists to space.
In an effort to better grasp the sun's past, present and future, Colombian and Spanish researchers made visualizations that meld the last 400 years of recorded solar observations. The sun is a churning celestial body with a lot going on. On top of singular episodes like flares, the sun experiences various cycles that last years, decades and longer. And these chapters in solar activity are full of lulls and highs that affect Earth in many ways.
Quantum entanglement in a macroscopic mechanical system has been demonstrated by physicists in Austria and the Netherlands, who confirmed that their experiment passes the “Bell test” for entanglement. The system was created by Simon Gro?blacher and colleges at Delft University of Technology and the University of Vienna and could lead to the development of new quantum-information technologies such as memory nodes.
Dr. Siddarth Joshi who recently moved to the University of Bristol and is continuing to develop quantum networks in the Quantum Engineering Technology Labs, said: "We created a very versatile quantum communication network where every user can talk to every other user simultaneously. We plan to build even bigger networks with many more users, with the goal to create a versatile foundation for building a quantum internet."
Earth is not the home you think it is. Far below the scant surface spaces we inhabit, the planet is teeming with an incredibly vast and deep 'dark biosphere' of subterranean lifeforms that scientists are only just beginning to comprehend. Hidden throughout this subsurface realm, some of the world's deepest and oldest organisms thrive in places where life shouldn't even exist, and in new research, scientists have quantified this 'dark matter' of the microbial world like never before.
As Americans’ attitudes towards psychedelics change, we’re seeing the start of something few would have ever dreamed possible: legalization. A slew of new research on the measurable benefits of psychedelic compounds, as well as increased media exposure and cultural acceptance has already made the 21st century stand in stark contrast to the extreme taboo and draconian state punishments levied against psychedelics in the 20th.
Does some aspect of our personality survive bodily death? Long a philosophical and theological question, in the 20th century this became the subject of scientific research. Fifty years ago, in 1967, Ian Stevenson, then chair of UVA's Department of Psychiatry, created a research unit—now named the Division of Perceptual Studies—to study what, if anything, of the human personality survives after death. In this Medical Center Hour, faculty from the Division of Perceptual Studies highlight the unit's work since its founding,