PHILADELPHIA — Though churning smokestacks, cud-chewing cows and gasoline-burning vehicles are contributing constantly to greenhouse gas emissions, there are also many processes that do the reverse, pulling molecules like carbon dioxide out of the atmosphere. One of these is chemical weathering, which occurs when rock turns into soil. Carbon dioxide molecules and rain combine to dissolve rock, and the weathering products, including sediment, eventually make their way through waterways to the ocean where some become trapped on the ocean bottom and in coral reefs and seashells.
Martin Seligman of the School of Arts and Sciences contributes his views about the psychology of mass murderers.
PHILADELPHIA — Directed assembly is a growing field of research in nanotechnology in which scientists and engineers aim to manufacture structures on the smallest scales without having to individually manipulate each component. Rather, they set out precisely defined starting conditions and let the physics and chemistry that govern those components do the rest.
La’Toya Latney’s grandmother has a photo from when Latney was about 5 years old. In it, she is sitting in front of the television, transfixed by a nature program on grizzly bears hunting salmon swimming upstream.
“At that time she said she knew I was going to be a veterinarian, so it’s been a long time coming for me,” says Latney.
PHILADELPHIA — In the waning days of 2012, two words have dominated the post-election discourse: “fiscal cliff.” The cliff is a combination of impending budgetary measures that will take effect in January if a legislative compromise is not reached.
One area of the budget that would see serious cuts is funding for the national science agencies, such as the National Institutes of Health and National Science Foundation. Combined with cuts to other agencies and departments, the amount of research and development funding lost could total $58 billion over five years.
PHILADELPHIA — Learning calculus is no easy feat. But beginning next month, the University of Pennsylvania’s Robert Ghrist will use a new, visually stimulating approach to engage tens of thousands of students in the task with a massive open online course, or MOOC, offered through Coursera’s online platform.
Carl June of the Perelman School of Medicine and his research team discuss their unique genetic therapy that has “tamed terminal leukemia in seven out of the first 10 patients” and its risks.