At Scientology’s request, several Web sites took down a video of Tom Cruise talking passionately about the church, but Gawker isn’t budging.

Global Solar says it's number one in solar cells made from copper indium gallium selenide, but so does Nanosolar.

Researchers have developed a new way to detect protein movements inside cells, which signal a variety of cellular changes such as those in cancer cell development. The method could help diagnose cancer in the future. By combining two distinct techniques, the technology can examine large numbers of cells individually, a feat not previously possible.

Multipotent adult progenitor stem cells extracted from bone marrow, and known as MAPCs, have proved to be effective in the regeneration of blood vessel tissue and also in muscle tissue when treating peripheric vascular disease.

A molecule designed by a Purdue University researcher to stop the debilitating symptoms of Alzheimer's disease has been shown in its first phase of clinical trials to be safe and to reduce biomarkers for the disease. CoMentis, the pharmaceutical company developing the drug, announced completion of its Phase 1 study of a treatment based on the molecule. Results from the study indicate that the treatment is safe and well tolerated.

A new computer-based text-searching tool automatically -- and quickly -- compares multiple documents in a database for similarities, providing a more efficient method to carry out literature searches, as well as offering scientific journal editors a new tool to thwart questionable publication practices.

A new study of worldwide technological competitiveness suggests China may soon rival the United States as the principal driver of the world's economy -- a position the US has held since the end of World War II. If that happens, it will mark the first time in nearly a century that two nations have competed for leadership as equals.

Like mobsters, cells keep their friends close and their enemies -- at least some of them -- closer. According to new results from HIV researchers, one way that human cells prevent certain viruses from raging out of control is by blocking new viral particles from ever leaving an infected cell's surface. And, they believe, HIV thrives in part because it has evolved the ability to get around this obstacle. Viruses can only reproduce using the mechanisms and material of their hosts. Some of them -- the so-called "enveloped" viruses, which are encapsulated inside a lipid membrane -- assemble at the host cell's outer membrane and then bud off during their release.