People can argue about whether or not manliness is on the decline, but one thing we can say for sure: the thing that makes men, men is shrinking.
The Y chromosome is shedding genetic material and getting smaller. Scientists are not sure why, or what will become of the Y chromosome. It is possible that it will disappear altogether, as it has in some species of rodents. This does not mean men will become extinct, however. DNA scientists believe the genes responsible for male development would be moved and replaced by “a switch that determines maleness.”
Read more: “Who Knows Y Chromosome Is Shrinking” (@The Age)