Youssef Refaat - Curios Nerd

That vaginas are the basis of human life. Not only because without a vagina you wouldn’t have been there, but also because without a vagina, something  else  wouldn’t have been there as well! Let me explain to you what is it. Did you that at some point in your life you had a vagina? yea vagina! For me, this is disturbing but still fascinating! Reproductive organs in human (whether as a male or female) during fetal life is the same. It is an incompletely differentiated vagina that is waiting a signal from your body to differentiate. If you are a male which means that you have XY chromosomes, genes on your Y chromosome will make this incompletely differentiated vagina turn into the male reproductive system. While if you are a female, this vagina will continue to differentiate more and more until it gives the final familiar shape. Take a look! Unfortunately, there are some unlucky males who have problems with the genes that are responsible for the differentiation of their genital...

Human mutations are some changes in the human genotype (DNA) that may be manifested as phenotypic changes. Some of these are beneficial. Some are lethal! Let' talk about some of the most interesting genetic mutations in human being! Stephen Crohn: The first man on earth to be resistant to HIV, also known as "The man who can't catch AIDS" Before telling the exact details of the mutation, and how Crohn became resistant to HIV. I want to tell you some very basic concepts of how HIV infects humans and ultimately causes death almost 10–15 years after exposure. HIV infects our white blood cells. Specifically, a type of white blood cell called Helper T-cell CD4. Firstly, the receptor on HIV called gp120 reacts to a receptor on the WBC called CD4 protein. After this interaction, the virus exposes another part of its GP120 molecule that interacts with another protein on the WBC called CCR5. CCR5 anchors the virus on the cell membrane and helps in the fusion of both membranes t...