Youssef Refaat - Curios Nerd

It is the placenta definitely! The fetus inside his mother is nourished via a structure called the placenta. It is responsible for delivering blood, nutrients, and oxygen to him while taking away the toxic metabolites that the body no longer needs. How did vertebrates evolve to have a placenta?! Placentas probably first evolved about 150 million to 200 million years ago. In fact, without placenta, neither I nor you would have been there! no one ever would have been there! or maybe we would exist as species that still lay eggs! How did this crazy structure evolve? before going into the nerdy stuff, let me introduce to you some basic concepts related to the placenta and how it develops that would be useful for you for the rest of your life and for the purpose of understanding this article. The steps of the development of the placenta can be very complex. I will make it very simple, concise, and in a few words. We all know that the first step in making us was the fusion of daddy's spe...

  Each year, there are millions of deaths. Have you ever wondered what might be the #1 cause of death in the world and in the united states? It is heart disease. Was this the same cause of death hundreds of years ago? No. Then why the rate of heart disease has been abruptly increasing recently? What something people do that trigger this? Is this genetic? If it was completely genetic, then why it didn't happen years ago? There is another thing to keep in mind. It is the rate of diabetes mellitus type 2 and system hypertension has also been increasing so much so that we began to those disease in relatively young people! What is happening? Is there something in our world today that lead to the development of DM, HTN, and heart disease? Yes. Do they tend to occur together? Yes. Then what is the trigger? Let's see. It turns out that hypertension and DM tend to go together. Both diseases are found together in most patients. It seems that diabetes can trigger hypertension and the reve...

There is no doubt that this pandemic has completely changed every plan in our lives. We never expected that to happen. Even after we started to realize that the world in danger, we didn't feel the real danger until we found our beloved ones are affected by the pandemic (infected with COVID-19.) I never thought that I will be affected until I found my sister extremely ill from the virus. I didn't want to accept the fact.  No need to go to university to learn something (unless you are a nerdy guy who got into one of the ivy league schools) It has been around 4 months since I last visited my college. I have been studying from home all this period. I think my life became more productive. I found that the university was a waste of time. I can learn by myself or by online lectures and no need to go to the university and waste time. Not only that but also I found that even practical lessons we take are useless. We can live without Macdonalds Yea we survived this for months! We can li...