Physical activity for health

American scientists say that they now know why HIV does not spread through saliva: a protein called SLPI in human saliva acts as a "guard", binding to white blood cells and stopping them from

A software programme called Computer Imaging Sperm Selection (CISS) that scientists working with rare animals incarcerated in zoos use to enhance the chances of fertilisation, is now being tested on

Damage to a small structure found in the brain impairs the ability to recognise emotions

American biomedical researchers at the Harvard School of Public Health, Boston, have devised a simple instrument to accurately measure carbon monoxide (co) in a person's lungs (Environment

A new surgical technique that involving only small incisions has been used for removing a cyst from under the lung

Pancreatic cells from pigs could help treat diabetics

Two genes induce the intrinsically female embryo to change into a male

How do sperms find the ova? Solomon Snyder and his colleagues at the Johns Hopkins University in Baltimore, Maryland, say that the male sex cells virtually sniff out their female counterpart (New

Two British genetic engineers have developed a blood substitute that could sustain the body for long periods on little oxygen. The inspiration for developing the artificial blood -- which could be