In Old English, human men were referred to as wer, while the term man was used to describe humanity as a whole. During the thirteenth century, man gradually replaced wer as the term for an adult human male while also maintaining its use as an expression for the entire human species.[5]
2
Globally, boy babies are 25% more likely to die in infancy than girl babies.[1]
3
Average height today for men in the U.S. is just over 5' 9" (175 cm) and average weight is approximately 190 pounds (86 kg). In 1960, average height for men was about 5' 8" (172 cm) and average weight was just over 166 pounds (75 kg).[7]
4
Worldwide, men have a life expectancy of 64.52 years, as compared to a life expectancy of 68.76 years for women.[7]
5
The most common cause of death for men in the U.S. is heart disease (the same as for women), and the average age of a first heart attack for men is just 66 years.[7Worldwide, there are approximately 107 baby boys born for every 100 baby girls. Scientists believe the elevated birth rate in favor of boys may be linked to the higher mortality rates of boys in infancy and childhood]
In the U.S., men have higher death rates for all of the 15 leading causes of death (with the exception of Alzheimer’s disease) and die more than five years younger than women.[7]
8
The brains of adult men are about 10% larger in total size than the brains of women. Because men generally have a larger stature and more muscle mass than women, their brains require more neurons to control the body.[1]
9
The word “boy” has been in recorded use since A.D. 1154 as a descriptive term for a male child. The exact etymology of the word is unclear, but it is believed to have descended from the Anglo-Saxon word boia, meaning “servant” or “farm worker.”[5]
10
Boys typically experience puberty between the ages of 12 and 14, a time in which the voice changes to its lower timbre, growth spurts occur, and the secondary sex characteristics begin to develop. Puberty for boys generally occurs later than in girls of the same age group.[7]