The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy. A more complete definition of gerontology includes all of the following:
Smelly bowel movements are caused by the release of gas. when bacteria, bile or acid mixes with food. Depending on the. food you eat, and where in your digestive tract the mixing. occurs, the combinations can produce various types of gas, all. with different smells.
1 It is not unusual for a newborn to suck for a very long time.  Your baby's bowel movements will now change to a greenish-brown colour and will look like thick pea soup. He will pass two to three stools per day. If your baby has not had a movement by the end of today, your doctor should be notified (Spock 2004).