![]() ![]() Now one in four people are missing at least one wisdom tooth. The people who are most likely to be missing at least one wisdom tooth are the Inuit of the northernmost regions of Greenland, Canada, and Alaska. This meant our jaw muscles didn't grow as strong as they used to, keeping the wisdom teeth beneath the gums increasing the risk of painful and deadly infection.Ī few thousand years ago, a mutation popped up that prevented wisdom teeth from growing at all. is the Central African Republic with 53 years, in Japan life expectancy is 30 years longer. This switch to soft grains and starches required less strenuous chewing than our past hunter-gatherer diet. Over the last decades this global inequality decreased. On our evolutionary road to becoming humans, our big brains crowded our skulls and narrowed our jaws, making it difficult for the third row of molars to emerge from the gums.Īnd after we began cooking our food and developed agriculture thousands of years ago, our diet became softer. It's not just oral surgeons who are removing wisdom teeth (third molars) from human mouths - evolution is playing a part too. Some scientists have suggested that living in cities helps this process along. Another type of mutation that's been spreading lately blocks malaria parasites from hanging out in the placenta.Īnd it's not just malaria - evolution has helped spread adaptations that protect against leprosy, tuberculosis, and cholera in certain populations as well. ![]() That makes it harder for the malaria parasite to sneak into a red blood cell. There are also more than a hundred slightly different genes that cause a shortage of a protein involved in breaking down red blood cells. Being on the verge of death, the guy is transferred to ten years ago, when the city was inhabited by people, not cruel monsters who want to absorb living flesh. Now the young man has the opportunity to be reunited with his friends, with his old love, and of course to save the city from infection. Summary A brief description of the manhua THE LAST HUMAN: Zuo Tian Cheng is the only one who managed to survive in a city filled with zombies. That's because there's a specific gene that, if you have one copy, will protect your red blood cells from invasion by the malaria parasite - but two copies will distort red blood cells and block their passage through blood vessels.īut that isn't the only trick that's evolved in the face of malaria. A brief description of the manhua THE LAST HUMAN: Zuo Tian Cheng is the only one who managed to survive in a city filled with zombies. discovers his passion for Japanese traditional dance and is confronted with the choice of. If you've taken an introductory biology course lately, you may remember a strange connection with sickle-cell anemia. THE LAST HUMAN PERSON ON EARTH is the story of Eric and Henry. The most-studied disease we've been outrunning lately is malaria. So it makes sense that evolution would be giving us a boost against some common diseases. Rod-shaped Mycobacterium tuberculosis bacteriaĮvolution is about the survival of the fittest - and a big part of evolutionary fitness is not dying from a disease before you've had children. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |