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Viewed through a microscope, a live, cultured cell doesn't seem to do much except lie placidly in its dish. But that's just a facade. The inside of the cell looks [...]

Reports on California-based biotech company Advance Tissue Sciences' entry into the technology of tissue engineering. Manufacture of products based on laboratory-grown cartilage and breast tissue; Scientific and medical problems of the company.

For a human being to live, millions of its cells must die, never to be renewed. Early in life bone marrow churns out millions of different candidate immune cells, for […]

After a decade of ever more elaborate genetic engineering procedures -- snipping, stitching, and packaging DNA -- some vaccine researchers are finding that the simplest method works best. Just administer [...]

When the U.S. soybean crop fell prey to a parasitic worm 10 years ago, Soviet scientists came to the rescue. Researchers in the United States had searched in vain for [...]

Who hasn't dreamed of extending his or her life span? A lowly worm can do just that. The tiny nematode Caenorhabditis elegans more than doubles its normal life expectancy when [...]

Someone shows you a phone number that you must remember. You will probably 'say' the number in your head until you can write it down. This 'inner-voice' mechanism of remembering [...]

The smoke from marijuana cigarette may impart only a transient high to adults, but it could have more lasting effects on infants, warn neuroscientists at the University of British Columbia [...]

Have you ever experienced pain from an injured finger that slowly spread until your whole hand hurts? You may have 'sensed' the diffusion of substance P, a neurotransmitter that helps [...]

Disturbances in serotonin's complex web of action have been blamed for many disorders, including migranes, depression, and schizophrenia. As researchers discover more types of receptor molecules for his neurotransmitter--14 are [...]

When male and female germ cells unite to create a new life, their genetic contributions come with tags labeling them as paternal or maternal. 'Reading' these tags, the developing embryo [...]

In a vertebrate embryo, the brain develops when neurons are generated along the lining of the brain's innermost cavities, the ventricles, and migrate to the outer rim of the brain. [...]

Morphology may have assigned the extinct giant ground sloth a wrong spot on the evolutionary tree, reports Matthias Hoss, a graduate student in the group of Svante Paabo at the [...]

When a promising, fast-moving field threatens to spin out of control, what do you do? Meet for a reality check. That's exactly what scientists in the young area of ancient [...]

'The enemy of my enemy is my friend.' South American farmers are making this Arab proverg a strategy in their fight against insect pests ravaging their cassava crops. Mustering an [...]

Scrambling about the slopes of the Tinguiririca River valley in the Chilean Andes, Andre R. Wyss hoped to find dinosaur bones. Wyss, a paleontologist at the University of California, Santa [...]

If DNA mutations caused by excessive sunbathing can promote skin cancer in humans, how do plants manage to get away without harm? Rooted in place, many plant species take in [...]

Reports on the finding by Mario Roederer and his colleagues at Stanford University in California regarding selective killing of the immune cells by HIV. Reason for AIDS patients, succumbing to bacteria, viruses and fungi; Dropping of proportion of naive T cells in AIDS patients; Point to be taken into account during clinical trials.

Focuses on research conducted by American biologists Kai Wucherpfennig and Jack Strominger which shows that viruses and bacteria may trigger multiple sclerosis (MS) by stimulating the immune system to attack nerve cells. Symptoms of MS; Infectious agents that may cause MS; Need for additional research on the subject.