Persistent, chronic pain has risen dramatically among full-time U.S. workers in the past 10 years, but workers today opt to go to their jobs rather than call in sick, leading to a growing trend of presenteeism – a negative impact on work despite being physically present at the job. These data, released today, are from a 2006 national survey conducted by Harris Interactive® on "Pain in the Workplace" (www.painandwork.com), sponsored by PriCaraÔ, Unit of Ortho-McNeil, Inc., and conducted in partnership with the National Pain Foundation (NPF). The survey was an update to the 1996 Louis Harris & Associates poll on the subject, sponsored by Ortho-McNeil Pharmaceutical, Inc.

Probes designed to find life on Mars do not drill deep enough to find the living cells that scientists believe may exist well below the surface of Mars, according to research led by UCL (University College London). Although current drills may find essential tell-tale signs that life once existed on Mars, cellular life could not survive the radiation levels for long enough any closer to the surface of Mars than a few metres deep – beyond the reach of even state-of-the-art drills.

Researchers at the University of Pennsylvania School of Medicine have discovered that microtubules -- components responsible for shape, movement, and replication within cells -- use proteins that act as molecular motors and brakes to organize into their correct structure. If microtubules are not formed properly such basic functions as cell division and transport can go wrong, which may have implications in such disease processes as cancer and dementia. The study, published in the January issue of Cell, is featured on the cover of that issue.

Virginia Tech researchers in computer science and biology have used the university's supercomputer, System X, to create models and algorithms that make it possible to simulate the cell cycle -- the processes leading to cell division. They have demonstrated that the new mathematical models and numerical algorithms provide powerful tools for studying the complex processes going on inside living cells.

Most snakes are born with poisonous bites they use for defense. But what can non-poisonous snakes do to ward off predators?

DNA testing is transforming health care and medicine, but current technologies only give a snapshot of an individual's genetic makeup. Any patient wanting a complete picture of their inherited DNA, or genome, would drop their jaw at the sight of the bill -- to the current tune of $10 million or more charged for every human or mammalian-sized genome sequenced.

Researchers at Johns Hopkins Bloomberg School of Public Health conducted a historical analysis to examine the relationship between the Centers for Disease Control and Prevention's (CDC) HIV prevention budget and HIV incidence in the U.S. from 1978 to 2006. The results are published in the January 2007 edition of the American Journal of Preventive Medicine.