Researchers from the University of Maryland have described a new definition of chaos that applies more broadly than previous definitions. This new definition is compact, can be easily approximated by numerical methods and works for a wide variety of chaotic systems. The discovery could one day help advance computer modeling across a wide variety of disciplines, from medicine to meteorology and beyond.
One question of the origin of life in particular remains problematic: what enabled the leap from a primordial soup of individual monomers to self-replicating polymer chains? A new model published this week in the Journal of Chemical Physics, proposes a potential mechanism by which self-replication could have emerged. It posits that template-assisted ligation, the joining of two polymers by using a third, longer one as a template, could have enabled polymers to become self-replicating.
Deworming children may not improve school attendance and the evidence that informs international policy needs to be re-appraised following a major re-analysis of data from an influential trial.
Data spanning 1987 to 2007 show changing demographics among public high school biology teachers. The workforce has become less experienced and has been destabilized by turnover, and biology teachers are more likely than other science teachers to work outside of their discipline.
A paper published today in the Proceedings of the National Academy of Sciences argues against the commonly held 'accumulation of mutations' model of oncogenesis in favor of a model that depends on evolutionary pressures acting on populations of cells.
A team of researchers in Colombia and Chile has explored the role of chaos in the dynamics of vehicles within cities, keeping traffic and the bus systems of various countries in mind, and this week in the journal Chaos, the team presents and analyzes the consequences of 'discrete mapping' the exact evolution of a bus operating under ideal city conditions.
Recent research by a team of archaeologists sheds new light on the variables that might have affected the human shift from hunting and gathering to food production.
New research provides mathematical evidence that Michelangelo used the Golden Ratio of 1.6 when painting 'The Creation of Adam' on the ceiling of the Sistine Chapel.
At the International Joint Conference on Artificial Intelligence later this month, MIT researchers will present a new statistical technique that yields better wind-speed predictions than existing techniques do -- even when it uses only three months' worth of data. That could save power companies time and money, particularly in the evaluation of sites for offshore wind farms, where maintaining measurement stations is particularly costly.
A research team out of Michigan Tech has found a way to solve one of the biggest challenges in making metamaterials. Their optical work is a big step towards creating a 'perfect lens'.