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.
We all think we know how certain things smell. But to someone else that same bottle of perfume-or piece of cheese, or glass of wine-may smell completely differently. American scientists have discovered that we all experience odours in a completely different way. Their paper, published in the Nature Neuroscience journal, reveals that 30 per cent of smell receptors differ between any two people. Each single receptor can alter the way each person perceives an odour.