A new study led by North Carolina State University's Dr. Scott Fitzpatrick is the first to show physical evidence that the people who colonized the Caribbean from South America brought with them heirloom drug paraphernalia that had been passed down from generation to generation as the colonists traveled through the islands.
Fritz et al. have identified an amino acid switch that flaviviruses flip to gain access to cells.
Flaviviruses such as tick-borne encephalitis virus (TBEV), yellow fever, and dengue are dangerous human pathogens. These membrane-encircled viruses enter cells by being gobbled up into endosomes and fusing their membrane with that of the endosome.
SALT LAKE CITY – University of Utah geologists identified an amazing concentration of dinosaur footprints that they call "a dinosaur dance floor," located in a wilderness on the Arizona-Utah border where there was a sandy desert oasis 190 million years ago.
The three-quarter-acre site – which includes rare dinosaur tail-drag marks – provides more evidence there were wet intervals during the Early Jurassic Period, when the U.S. Southwest was covered with a field of sand dunes larger than the Sahara Desert.
A study of residential patterns in America suggests that White and Black Hispanics born in the U.S. are more likely to share neighborhoods with native non-Hispanic Whites and African Americans, compared to foreign-born Hispanics -- a pattern consistent with immigrant assimilation. Hispanics from Mexico in particular integrate consistently with all ethnic groups over generations.
Stunt pilots have raced against computer-generated opponents for the first time — in a contest that combines the real and the 'virtual' at 250 miles per hour.
Using technology developed, in part, by a University of Nottingham spin-out company, an air-race in the skies above Spain saw two stunt pilots battle it out with a 'virtual' plane which they watched on screens in their cockpits.
Increasing bureaucracy is the biggest single threat to clinical research in the UK and urgent action needs to be taken, argue experts on bmj.com today.
European legislation introduced in 2001 was intended to simplify and harmonise the regulation of trials across the European Union. But it has led to long delays in approval, is "poorly coordinated, lacks inconsistency at all levels, and at times is completely illogical", write Professors Morris Brown and Paul Stewart.
During a two-hour meeting with the editor-in-chief of the journal Science, Chinese Premier Wen Jiabao expressed hope for increasing investment in basic research, reducing energy consumption by 4 percent annually as economic gains continue, improving food safety, and leveraging science to help the poor.
Wen's conversation with Bruce Alberts is being published in the journal's 17 October 2008 edition. An editorial written by Wen, plus a news article on science and technology in China, also will appear in a forthcoming issue of Science.
WASHINGTON, D.C.—Most of nine forecast models developed by political scientists predict a victory for Senator Barack Obama over Senator John McCain in the two-party contest for the popular vote in the 2008 presidential election. Obama is predicted to win an average of 52% of the vote with an 80% probability that he will gain more than half the total two-party popular vote.
A number of red squirrels are immune to squirrelpox viral disease, which many believed would lead to the extinction of the species, scientists have discovered.
Scientists led by the Zoological Society of London (ZSL) have identified eight cases in which free-living red squirrels have survived infection with the squirrelpox virus by mounting an immune response. The research is published today in the Springer journal Ecohealth.
A team of scientists, including astronomers from the Naval Research Laboratory (NRL), have detected long wavelength radio emission from a colliding, massive galaxy cluster which, surprisingly, is not detected at the shorter wavelengths typically seen in these objects.