Green roofs, well-established in Europe, are becoming a growing trend in North America.

Some benefits are tangible, like conserving energy and managing storm water runoff, while others are more speculative, such as improving air quality or having a positive psychological impact on communities. Green roofs are loosely defined as "landscapes over structure," and the methodology and vocabulary of green roofs are imported from Europe, especially from Germany, where green roofs have been required on most structures for over 20 years.  

Science 2.0 contributor Professor Paul S. Knoepfler of the University of California Davis School of Medicine is being honored at the World Stem Cell Summit with the Stem Cell Action 'National Advocacy Award' from the Genetics Policy Institute.

The World Stem Cell Summit is being held December 4-6, 2013 in San Diego, California, and more than 1,000 researchers and clinicians from around the globe will attend.

The stereotype of the scientist is having little creativity and knowledge that is 'a mile deep and a yard wide.'

Not so, according to a new paper which found that successful entrepreneurs and patent holders were also 8X as likely as other people to have participated in arts and crafts when they were children. The researchers put the cart before the horse a little, implying that piano lessons will make your child better in science - but it does reaffirm that creativity leads to more success in Science, Technology, Engineering and Math (STEM) fields.

"Open access" journal publishing was founded on the principle that corporations should not hold a copyright on research that was becoming increasingly taxpayer-funded. Instead of subscribers paying to read an article, taxpayers incur an additional fee and essentially buy access for everyone in the public.

Today, it is a booming industry, generating tens of millions of dollars for companies and with thousands and thousands of publications. There are also lesser-known flavors of open access. Traditional open access is reusable while some lesser forms simply allow a researcher to provide a download of a PDF of a paper on their own site.

High-achieving American students tend to be white and well-off, much like throughout all of history.

Your galaxy has a supermassiv black hole - so does mine as does every large galaxy.

But how did they grew so big is a matter of speculation.

Einstein predicted gravitational waves; ripples in space-time, generated by bodies changing speed or direction. Bodies, for instance, such as pairs of black holes orbiting each other. When galaxies merge, their resident central black holes are doomed to meet. They first waltz together then enter a desperate embrace and merge. Towards the end of this dance they're sending out gravitational waves at a frequency we can detect and played out again and again across the Universe, such encounters create a background of gravitational waves, like the noise from a restless crowd.