The lizards have gained and lost adhesive toes many times
Who wouldn’t envy the little gecko as it dashes up a smooth wall or hangs from a ceiling by a toe?
An engineer’s dream, gecko feet combine the best of duct tape and Post-It® Notes: They stick, but they don’t stay stuck. (more…)
It’s shaping up to be a fiery summer across the United States. According to the National Interagency Fire Center, as of July 3, 45 large active wildfires are currently burning in 15 states. Combined, these fires have scorched nearly three-quarters of a million acres. Since January 1, wildfires have burned nearly 2.2 million acres across the country, including devastating blazes in Colorado and New Mexico. We asked JPL Climatologist Bill Patzert to discuss the recent wildfire outbreak and whether climate change is playing a role.
Q: The U.S. wildfire season is off to an active start. What factors have contributed to the recent rash of blazes?
Patzert: Across the West, out-of-control wildfires this summer have left a heartbreaking path of destruction. The primary condition that triggered these fires was an unusually dry and warm La Nina winter and spring. These conditions primed the Western U.S. for an incendiary summer. The arrival of a persistent, scorching high-pressure system over the Western and Central U.S. just exacerbated already dangerous conditions, which reached a tipping point when strong, gusty winds sent these fires rampaging across the landscape. From New Mexico to Colorado and many other states, out-of-control wildfires are still burning through forests, grasslands and destroying neighborhoods. (more…)
Scientists have for the first time watched and manipulated stem cells as they regenerate tissue in an uninjured mammal, Yale researchers report July 1 online in the journal Nature.
Using a sophisticated imaging technique, the researchers also demonstrated that mice lacking a certain type of cell do not regrow hair. The same technique could shed light on how stem cells interact with other cells and trigger repairs in a variety of other organs, including lung and heart tissue.
“This tells us a lot about how the tissue regeneration process works,” said Valentina Greco, assistant professor of genetics and of dermatology at the Yale Stem Cell Center, researcher for the Yale Cancer Center and senior author of the study. (more…)
A new app for android phones allows Londoners to share their experiences about the London Underground as they travel, and could transform how we use public transport.
The new application, called Tube Star, has been developed by researchers at UCL and aims to capture the experience of being in the tube, as reported by passengers. The app’s designers hope that it will give travellers a way of sharing their knowledge as well as improving our understanding of what happens when things go wrong – or right – on the underground. (more…)
A new study indicates that mass extinctions affect the pace of evolution, not just in the immediate aftermath of catastrophe, but for millions of years to follow. The study’s authors, University of Chicago’s Andrew Z. Krug and David Jablonski, will publish their findings in the August issue of the journal Geology.
Scientists expected to see an evolutionary explosion immediately following a mass extinction, but Krug and Jablonski’s findings go far beyond that.
“There’s some general sense that the event happens, there’s some aftermath and then things return to normal,” said Krug, a research scientist in geophysical sciences at UChicago. But in reality, Krug said, “Things don’t return to what they were before. They operate at a different pace, sometimes more rapidly, other times more slowly. Evolutionary rates shift, and that shift is permanent until the next mass extinction.” (more…)
Health programs should focus on men’s strengths to help them thrive amid societal stressors
COLUMBIA, Mo. –Black men, especially those living in low-income, urban areas, face many societal stressors, including racial discrimination, incarceration and poverty. In addition, these men have poorer health outcomes. Now, a University of Missouri faculty member has studied these men’s efforts to negotiate social environments that are not designed to help them attain good health and success. (more…)
UD researchers use weevils to check spread of prolific mile-a-minute weed
Mile-a-minute weed has declared war on Doug Tallamy’s yard. This non-native, invasive vine is growing up his trees, scrambling over shrubs and smothering tree seedlings. By blocking sunlight, it weakens a plant by reducing its ability to photosynthesize.
Mile-a-minute doesn’t care one whit that Tallamy, professor and chair of the University of Delaware’s Department of Entomology and Wildlife Ecology, is a highly respected proponent of native gardening who doesn’t believe in planting any non-natives, let alone a highly invasive non-native.
“The deer brought mile-a-minute from our neighbor’s yard three years after we moved in,” says Tallamy. “We had just a few plants the first year, a few hundred the second year, and 20 trillion the third year.” (more…)
comScore Releases May 2012 Overview of European Internet Usage Showing Tumblr, Otto Gruppe and Groupon among Most Women-Oriented Web Properties
London, UK, 2 July 2012 – comScore, Inc., a leader in measuring the digital world, today released an overview of internet usage in Europe, showing 
that 395.7 million Europeans went online in May 2012 for an average of 27.6 hours each. The data for May, which includes internet usage in 49 European markets aggregated into the European region and individual reporting on 18 markets, also highlights the site categories and web properties with the highest concentration of usage among women in Europe. Tumblr.com had the highest concentration of usage among women, who accounted for 69 percent time spent on the popular social network. The report also showed that women generated the majority of time spent on multiple Retail subcategories, such as Fragrances/Cosmetics (71 percent share), Apparel (67 percent) and Department Stores (65 percent). (more…)
