Study Outline. 1  Microbiology-An Introduction. 2  Microbiology is the study of organisms too small to be clearly seen by the unaided eye (i.e., microorganisms); these include viruses, bacteria, archaea, protozoa, algae, and fungi.tudy Outline. 1  Microbiology-An Introduction. 2  Microbiology is the study of organisms too small to be clearly seen by the unaided eye (i.e., microorganisms); these include viruses, bacteria, archaea, protozoa, algae, and fungi.
Well, according to the CIA's The World Factbook, the current average human lifespan is approximately 66 and a half years. On average the current life expectancy for the world is about 67.2 years.
Our life statistics chart shows how long males and females can expect to live for in various world countries. (Age in years from birth to death) The oldest confirmed recorded age for any human ever born is 122 years of age, though some people are reported to have lived longer there are no records to confirm these claims. There are, of course, great variations in life expectancy statistics worldwide, mostly caused by differences in public health, medical care and diet from country to country.