Hurdia victoria was originally described in 1912 as a crustacean-like animal. Now, researchers reveal it to be just one part of a complex and remarkable new animal that has an important story to tell about the origin of the largest group of living animals, the arthropods.
The fossil fragments puzzled together come from the famous 505 million year old Burgess Shale, a UNESCO World Heritage Site in British Columbia, Canada. Uppsala researchers Allison Daley and Graham Budd at the Department of Earth Sciences, together with colleagues in Canada and Britain, describe the convoluted history and unique body construction of the newly-reconstructed Hurdia victoria, which would have been a formidable predator in its time.
Where do supernovae come from?
It depends on who you ask. Astronomers know they were exploding stars but there was always more to the story. Researchers from the Dark Cosmology Centre at the Niels Bohr Institute, University of Copenhagen and from Queens University, Belfast say dying red supergiant stars can also produce supernovae.
Want to know what will make you happy? Ask a stranger. Another person's objective opinion may be more informative than your own best guess. The study in Science was led by Daniel Gilbert, professor of psychology at Harvard and author of the 2007 bestseller "Stumbling on Happiness," along with Matthew Killingsworth and Rebecca Eyre, also of Harvard, and Timothy Wilson of the University of Virginia.
Previous research in psychology, neuroscience, and behavioral economics has shown that people have difficulty predicting what they will like and how much they will like it, which leads them to make a wide variety of poor decisions. Interventions aimed at improving the accuracy with which people imagine future events have been generally unsuccessful.
A new study says that some aspects of peoples' cognitive skills, like making rapid comparisons, remembering unrelated information and detecting relationships, will peak at about the age of 22 and then begin a slow decline starting around age 27.
Timothy Salthouse, a University of Virginia professor of psychology and the study's lead investigator, and a team conducted the study during a seven-year period, working with 2,000 healthy participants between the ages of 18 and 60.Participants were asked to solve various puzzles, remember words and details from stories, and identify patterns in an assortment of letters and symbols.
A new study says that the human brain lives "on the edge of chaos", at a critical transition point between randomness and order. Theoretical speculation? Well, yeah, but that's the nature of neuroscience.
The researchers say self-organized criticality (where systems spontaneously organize themselves to operate at a critical point between order and randomness), can emerge from complex interactions in many different physical systems, including avalanches, forest fires, earthquakes, and heartbeat rhythms.
Kids love sweet-tasting foods and new research indicates that this heightened liking for sweetness has a biological basis and is related to children's high growth rate.
Liking sweets is a cross-cultural phenomenon for kids, a pattern that declines during adolescence. To explore the biological underpinnings of this shift, Researchers looked at sweet preference and biological measures of growth and physical maturation in 143 children between the ages of 11 and 15.
SHANGHAI, March 19 /PRNewswire/ -- The Soitec Group (Euronext Paris), the world's leading supplier of silicon-on-insulator (SOI) wafers and other engineered substrates for the microelectronics industry, announced today a new partnership with a distributor in China to strengthen its Far East presence. A member of the Shanghai Semiconductor Association, Cantang Electronics Technology Inc. is a professional service provider specialized in semiconductors, with staff and engineers that understand SOI technology and its markets. Under the new partnership agreement, Cantang Electronics will distribute, market and support Soitec's products and services throughout China.
Bell curves are everywhere. Pick 100 random people and measure them: measure their height, their weight, their blood pressure, their time to run a mile, or to sprint 50 yards, and their IQ, and you find that most of us fall in the middle of the spectrum, while there are always some people on either extreme. Why?
The puzzle grows deeper when you think about genetics. If a trait like height is controlled largely by genes, how is it that height falls into a bell-curve pattern? Bell-curves seem completely at odds with what we learn about the discrete genetics of Mendel's round and wrinkled peas in high school biology.
It turns out that the solution to this puzzle is fairly simple (although the details get messy). In fact, Darwin's cousin hit on the right answer (long before he or anyone else knew about Mendel's genetics), with what he called the "Supreme Law of Unreason": a bell curve is exactly what you expect when you toss together "a large sample of chaotic elements." In other words, genetics is like one big game of The Price Is Right.
WASHINGTON, March 18 /PRNewswire/ --
The Vatican has yet again been forced to revise statements made by Pope Benedict XVI as he embarked on a foreign trip. En route to Cameroon on March 17, the pope claimed that condom use would aggravate the problem of HIV.
A transcript of the pope's comments on the Vatican's Web site altered the comment to suggest that condoms risked aggravating the problem.
Jon O'Brien, president of Catholics for Choice, welcomed the change as a sign that the pope is not infallible on this issue and is willing to acknowledge his mistakes.
MIGDAL HA'EMEK, Israel, March 18 /PRNewswire/ --
