A recent study at Harvard University has suggested that a probable mechanism to slow the aging process might be packed into a tiny protein called sirtuin, which can be activated by a natural chemical known as resveratrol.
The study of the origin of planets is appealing for many reasons; after all, understanding the origins of Earth makes it easier to find other systems likely to form Earth-like planets. But since it is unlikely to catch a planet in the process of forming, researchers in this field require a certain amount of creativity, always needing to find new ways to "observe" planet formation billions of years after the fact.
Human Immunodeficiency Virus, HIV, causes AIDS by attacking the immune system and by impairing the body's ability to fight infection. There is no cure for AIDS, which afflicts approximately 33 million people worldwide presently.
If you know what blood group you belong to, you might have noticed a plus or a minus sign next to your group; A, B, AB, or O. This plus or minus sign refers to the presence or absence, accordingly, of a protein in the surface of your red blood cells called a Rhesus factor (abbreviated as Rh). A different Rh group between a mother and the baby she is expecting may lead to the production of antibodies by the mother, while the unborn baby may suffer organ enlargement and anemia.