Evolution has worked to improve the genetic foundations of our health for millions of years now but new research suggests that things may be reversing and that might spell bad news for modern humans in the modern world. The study was conducted by the Georgia Institute of Technology recently.
Human evolution has worked to weed out genetic variants that are associated with diseases and it’s worked to promote variants that protect us against certain diseases according to this new study which was a comparative genetics study. However, for some odd reason over the past 500 to 1000 years it appears things have reversed. For example, the study has concluded that cardiovascular problems were much more common in our ancient human ancestors than they are today. What this means is that some diseases may be on the rise in modern humans and especially in terms of mental health.
Large populations are better able to purge disease causing gene variants and today with the human population near 7 billion people that is happening but still for some reason it appears this trend has been reversing over the past 500-1000 years. The study also found that Neanderthals and Denisovans had a lot more alleles (genetic variants) that promoted disease than we do today including heart disease. Over the course of time things got better and the variants for such widespread diseases were apparently weeded out as protective alleles rose. Continue Reading