Although any T. Rex –enthralled kid will tell you that a gigantic asteroid wiped the dinosaurs off the planet, scientists have always regarded this impact theory as a hypothesis subject to revision based on further evidence gathered from around the globe. Other possible causes, such as volcanism and smaller, multiple asteroid strikes, never actually went away, and over the years researchers raised important points that did not fully jibe with a history-changing celestial impact near the Yucatan peninsula one awful day some 65.5 million years ago. [More]

Time taken to detect brain tumors could soon be significantly reduced, thanks to researchers in the UK who are developing the technology for next generation SPECT (single photon emission computed tomography) imaging that is set to revolutionize the medical imaging process improving future diagnosis of cancer .

A worldwide team of researchers has for the first time created a particle that is believed to have been in existence immediately after the creation of the universe -- the so-called "Big Bang" -- and it could lead to new questions and answers about some of the basic laws of physics because in essence, it creates a new form of matter.

When people get exposed to the mycobacterium responsible for tuberculosis, some will become sick with a disease that is a major cause of mortality around the world while others simply don't. Now, researchers can point to one important reason for this variation in susceptibility or resistance. It turns out individuals with a certain genetic variation are less likely to succumb to tuberculosis. They also appear to gain protection against leprosy, a disease which is also caused by mycobacterial infection.

A new study shows that the more graphic and intense war news is, the less likely that viewers -- regardless of political beliefs -- will remember the advertising that follows the news.

Mars Express encountered Phobos March 3, smoothly skimming past at just 67 km, the closest any artificial object has ever approached Mars' enigmatic moon. The data collected could help unlock the origin of not just Phobos but other "second generation" moons.

Psychosurgery is making a comeback. Recently published case series have shown encouraging results of so-called deep brain stimulation (DBS) in treatment-resistant obsessive-compulsive disorder, depressive disorders, and Tourette syndrome.

Dutch and U.S. researchers are testing new acoustics technology that could be mounted on the outside of small aircraft, listening for characteristic sounds that indicate the presence of other fliers. Called an acoustic vector sensor (AVS), the system uses nanoscale materials to alert pilots to other aircraft within about 10 kilometers, a system that may help prevent midair collisions such as the one between a private plane and a sightseeing helicopter over New York City's Hudson River in August 2009, the researchers say. [More]

The saying "You're only as old as you feel" really seems to resonate with older adults, according to new research.

The most common digital security technique used to protect both media copyright and Internet communications has a major weakness, computer scientists have discovered.