Galaxy Zoo: Hubble Does dark matter come in two types? Contradictory results from experiments searching for dark matter can be resolved if the elusive dark stuff is made up of two types of particle, according to physicists in the US. The new theory could clear up a mystery that came to light in 2008, when the PAMELA collaboration released one of the strongest pieces of evidence yet for the direct detection of dark matter – a substance thought to make up over 80% of the universe's matter. PAMELA saw a bump in the abundance of cosmic anti-electrons, also known as positrons, thought to be generated as dark-matter particles annihilate. That isn't the only problem. Lurking in the 'hidden sector' Now Daniel Feldman at the University of Michigan and colleagues at other US institutions think that they have found a way to join up these mismatching signals. I think that we have the first model with which we are able to explain essentially all of the current dark-matter data Pran Nath, Northeastern University Tantalizing hints Testability is a benefit
Services & tools - News tracking - Desktop news alerts PrintEmailShare Email briefings video What is the email briefings service and how do I sign up for it? Serkan My alerts FAQ What different alert types are available? Author alerts FAQ What is an author alert? Corporate services emails FAQ What are Corporate Services emails? The Super Simple Guide to Setting Up Your First Company Facebook Page Without Blowing a Gasket - Part One In the world of small business and social media, we're seeing a massive migration to company Facebook Pages. It's no wonder, they offer amazing functionality at practically no cost and they give businesses a chance to connect with the more than 300 million people who have already flocked to Facebook. There's amazing viral potential involved with Facebook pages and it provides companies an easy way to reap the benefits of photos, videos, discussion forums, micro-blogging and pretty much every other form of social media in one neat little package. But there's a problem. They're NOT easy to set up. Those of us in the industry might scoff at that statement. So in the spirit of my Twitter start-up guide, let's do this again on the Facebook front. Why Facebook? If you thought Facebook was just a way to share photos and life updates with friends and family, you haven't looked very deeply into the largest social networking site this side of 2008. Need a little more perspective? Yoo Hoo! 1. 2.
Your Age on Other Worlds Want to melt those years away? Travel to an outer planet! <div class="js-required"><hr> This Page requires a Javascript capable browser <hr></div> Fill in your birthdate below in the space indicated. (Note you must enter the year as a 4-digit number!) Click on the "Calculate" button. The Days (And Years) Of Our Lives Looking at the numbers above, you'll immediately notice that you are different ages on the different planets. The earth is in motion. The top-like rotation of the earth on its axis is how we define the day. The revolution of the earth around the sun is how we define the year. We all learn in grade school that the planets move at differing rates around the sun. Why the huge differences in periods? Johannes Kepler Tycho Brahe Kepler briefly worked with the great Danish observational astronomer, Tycho Brahe. Here you see a planet in a very elliptical orbit. Kepler's third law is the one that interests us the most. The Gravity Of The Situation Isaac Newton ©2000 Ron Hipschman
Japanese Spacecraft Deploys First-Ever Solar Sail | Wired Scienc The unfurling of a Japanese solar sail, the first demonstration of a new space propulsion technology, went exactly according to plan. According toJAXA’s blog posts and photos from the event, the IKAROS spacecraft’s sail appears to be in place. It’s a big step in its attempt to travel driven only by sunlight. “This is the first sail ever deployed in space, and if they succeed in using it for solar-sail flight — it’ll still be a few weeks before we know that — it’ll be a milestone,” said Louis Friedman, executive director of the Planetary Society, an organization dedicated to promoting space exploration, which is readying its own solar-sailing mission. A solar sail uses the pressure from photons striking its surface to push the spacecraft through space. “The actual force might be just a few millionths of a g, but because it acts continuously, it allows you to build up large velocity changes over time,” Friedman said. The Japanese sail also has thin-film solar cells built into it. See Also:
The Linux Game Tome gladiator cemetery found in England Unearthing gladiators' graveyard Archeological dig finds bodies showing teeth marks, injuries from weaponsExperts say clues point to gladiators buried in cemetery'Highly unlikely that this individual was attacked by a tiger as he was walking home from the pub'Israeli archeologists announced the discovery of a huge cache of religious objects about 3,500 years old London, England (CNN) -- Heads hacked off, a bite from a lion, tiger or bear, massive muscles on massive men -- all clues that an ancient cemetery uncovered in northern England is the final resting place of gladiators, scientists have announced after seven years of investigations. The archeological dig has found "what may be the world's only well-preserved Roman gladiator cemetery," the York Archaeological Trust said. Scientists have found 80 skeletons in the "unique" cemetery under the city of York, northern England, since 2003. They first thought the graveyard might contain the remains of criminals or political purges.
Stephen Hawking: 'There is no heaven; it's a fairy story' | Science A belief that heaven or an afterlife awaits us is a "fairy story" for people afraid of death, Stephen Hawking has said. In a dismissal that underlines his firm rejection of religious comforts, Britain's most eminent scientist said there was nothing beyond the moment when the brain flickers for the final time. Hawking, who was diagnosed with motor neurone disease at the age of 21, shares his thoughts on death, human purpose and our chance existence in an exclusive interview with the Guardian today. The incurable illness was expected to kill Hawking within a few years of its symptoms arising, an outlook that turned the young scientist to Wagner, but ultimately led him to enjoy life more, he has said, despite the cloud hanging over his future. "I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. "I regard the brain as a computer which will stop working when its components fail. The universe is governed by science.