My recent article  on the relationship between Einstein's Theory of Relativity and superluminal neutrinos has triggered a series of comments. Some of them were reasonable, some others not. Among the reasonable doubts on this topic, there is a possible concern about the meaning of "limiting velocity", i.e. velocity that cannot be exceeded in the context of the theory. Could it be that we have found a new limiting velocity-  the one of neutrinos- and the theory still stands up with a new value for a fundamental constant c? Could it be that the speed of light is not well measured?

The biodiversity of the ecological community may impact whether a species can evolve to survive climate change, according to a numerical model that simulates the effect of climate change on plants and pollinators.

The study in Evolutionary Applications seeks to address a looming concern; whether species that have survived large climatic change in the past can survive future climate change. In the study, researchers used computer simulations to examine the effect of climate change on populations of flowering plants and their insect pollinators. 

Insects who can scale walls are able to do so because of the thousands of tiny hairs that cover their feet and legs. The hairs have flattened tips that can splay out to maximize contact, even on rough surfaces. 

The ability of insects to run up walls and hang from ceilings have fascinated humans for centuries. Scientists from the Zoological Institute at the University of Kiel, in Germany, have created a dry tape similar to the hairs on insects that can be repeatedly peeled off without losing its adhesive properties. They presented their work at the AVS Symposium held last week in Nashville, Tenn.

Old-fashioned 'leatherhead' football helmets from the early 1900s were as effective, and sometimes better, than modern football helmets - at least when it comes to injuries during routine, game-like collisions.

The study in the Journal of Neurosurgery: Spine compared head injury risks of two early 20th Century leatherhead helmets with 11 top-of–the-line 21st Century polycarbonate helmets. 

Varices, commonly called varicose veins, are a cosmetic problem if they occur as spider veins but in their advanced stage they pose a real health threat. In those patients, the blood is no longer transported to the heart unhindered but instead pools in the veins of the leg because the vessel walls or venous valves no longer function adequately.

Estimates show that 2010 was by far a record year for CO₂ emissions from fossil-fuel combustion and cement manufacture. Globally 9,139 Teragrams, a teragram is a million metric tons, of oxidized carbon (Tg-C) were emitted from these sources.

Converted to carbon dioxide, so as to include the mass of the oxygen molecules, this amounts to over 33.5 billion metric tons of carbon dioxide. The increase alone is about 512 Tg-C, or 5.9%, over the 2009 global estimate. The previous record year was 2008, with 8,749 Tg-C emitted; the 2010 estimate is about 104.5% of that, or 391 Tg-C more.

What goes on underneath the most deadly volcanoes?  As my PhD investigates the processes that occur below the ground on Santorini, I thought I would try to explain some of what goes on under every active volcano.

The advances in genetics and genomics have given rise to a flourishing personal genomics industry. All you need is a credit card and you can order a DNA kit on the internet. Once it arrives, all you have to do is rub a swab over your cheeck and send it back. A little later, voila, genetic information is sent to you, indicating your risk for a certain disease, or telling you whether your child is really yours, or something else.

This is a continuation of "As is well known about elliptic trajectories" where I have put it as a sort of homework to find out which force fields support elliptic trajectories. The "problem" has been solved in a response to my first post. That other field is known as isotropic harmonic oscillator. It is discussed below. Now I will come with my personal story behind all this.

Physical activity is always good for you but a new analysis says it may patients reduce their risk of developing glaucoma. Higher levels of physical exercise appear to have a long-term beneficial impact on low ocular perfusion pressure (OPP), an important risk factor for glaucoma.

The analysis examined the relationship between physical activity and current OPP in 5,650 men and women aged 48-90 who live in the U.K. and were part of initial cohort from 1993-1997.