When black holes slam into each other, the warping of space and time must be so complicated that physicists haven't been sure how to understand the details of what goes on, but by combining theory with computer simulations, Kip Thorne, Feynman Professor of Theoretical Physics, Emeritus, at the California Institute of Technology (Caltech) and colleagues say they have developed conceptual tools they've dubbed tendex lines and vortex lines.
Wikipedia is commonly derided as inaccurate and partisan but, at least when it comes to verifiable facts (rather than slant) that isn't the case, at least in political biographical information.
Brigham Young University political scientist Adam Brown focused on past and present candidates for governor across the 50 states. Brown fact-checked biographical information and voting statistics and found very few inaccuracies. When Brown conducted the study, Wikipedia contained articles for 230 of the 246 major-party candidates that ran for governor between 1998 and 2008. Brown found that all of the verifiable biographical information in those articles was completely accurate.
Acupuncture is advocated by some for pain control but there are doubts about its effectiveness and its safety. Investigators from the Universities of Exeter&Plymouth (Exeter, UK) and the Korea Institute of Oriental Medicine (Daejeon, South Korea) evaluated systematic reviews of acupuncture in order to explore the issue.
Their analysis in PAIN concluded there is little convincing evidence that acupuncture is effective in reducing pain and serious adverse effects continue to be reported.
A group of patients withneurodegenerative diseases have helped researchers discover a neurological basis of embarrassment. The thumb-sized bit of tissue in the right hemisphere of the front part of the brain is called the pregenual anterior cingulate cortex and they found the link using...karaoke.
They recorded people belting out "My Girl" – the 1964 hit by The Temptations - and then asked them to listen to their own singing without the accompanying music. The degree to which the singers were embarrassed in hearing themselves sing depended on the integrity of the pregenual anterior cingulate cortex region.
You know this already - given sufficient forward speed, a bicycle pushed sideways will not fall over.
Since the bicycle was invented, scientists have postulated various reasons as to why a bicycle is self stable above a certain speed. The consensus has been that a bicycle's stability is related to two factors: First, the rotating wheels of the bicycle provide stability through gyroscopic effects; secondly, that the ‘trail’, the distance by which the contact point of the front wheel trails behind the steering axis, plays an important part.
A new study of the eyes of fossil animals in Science overturns the conventional wisdom that dinosaurs were active by day while early mammals moved at night. Instead, dinosaurs like velociraptor hunted by night while the big plant-eaters browsed around the clock.