Evolution is defined as the change in frequency of certain traits across generations. The accumulation of new traits may lead to new characteristics or even new species over time. This means that, with time, enough changes can lead to the formation of a new species. Evolution is a continuous, extremely gradual process that has created…
Tag: lactation
The Breasts
The breast is a tissue that covers both male and female chest muscles. They are secondary sex characteristics and develop differently in males and females. When talking about breasts people generally refer to those of the female. This is because they are an important part of breastfeeding and sexual pleasure. Breasts vary in size, shape,…