Hospitals use disinfectants but they don't all kill the human papillomavirus (HPV), according to a new paper. Non-sexual transmission of the virus is exceedingly rare but hospitals need to be cautious so changes should be made, say researchers from Penn State College of Medicine and Brigham Young University.

How did we evolve a face?

Vertebrates, backboned animals, come in two basic models: jawless and jawed.  Jawed vertebrates, including us, number over 50,000 species but there are two jawless vertebrates in existence today; lampreys and hagfishes. It is known that jawed vertebrates evolved from jawless ones, a dramatic anatomical transformation that effectively turned the face inside out. 

A team of researchers used micron resolution X-ray imaging and show how a series of fossils, with a 410 million year old armored fish called Romundina at its center, documents the step-by-step assembly of the face during the evolutionary transition from jawless to jawed vertebrates. 

The people generally called Clovis were not the first humans in America but they were the first to accomplish expansion on the North American continent. Then they died out, leaving only speculation. 

Starting somewhere around 13,000 years ago, they hunted mammoth, mastodons and giant bison with big spears. Today there exists only one human skeleton  - a small boy between 1 and 1.5 years of age that was found in the 12,600 Anzick Site in Wilsall, Montana. It was found in association with Clovis tools, making it among the oldest human skeletons in the Americas. 

If there is a sociological fad, trend or fashion and it catches the attention of the public, you can be sure someone will start doing weak observational studies and get published in journals.

Almost anything can be termed an 'addiction' if people do it too much; checking their email, playing Risk or even watching porn. Because addiction is considered physical, the term connotes legitimacy and that means it will have to be covered under insurance. It's a huge windfall if a successful new disease can be manufactured.

The U.S. Geological Survey has gone cosmic and produced the first global geological map of Ganymede, Jupiter's largest moon and the largest in the solar system.

Conversion landscapes to cement-dominated urban centers would seem to cause great losses in biodiversity, yet nature i heartier than you might think. According to a new study involving 147 cities worldwide, surprisingly high numbers of plant and animal species persist and even flourish in urban environments, to the tune of hundreds of bird species and thousands of plant species in a single city.