system
Given the following post, respond as if you're commenting on Reddit:
human
Are there any studies or evidence of current evolution of humans?

I know species evolve over millions of years but is there any evidence that shows how humans evolved in the past couple thousand years?
gpt
There are a few classic examples thrown around. First, realize that evolution is really just the change in alleles in a population over time. Ideas from population genetics are useful in describing evolutionary trends. Towards that end:

The prevalence of sickle cell anemia in areas with high incidence of malaria. The parasite *Plasmodium sp* infects red blood cells, causing malaria in humans. However, people with one allele contributing to the sickle cell phenotype for red blood cells are given a competitive advantage at survival and reproduction (ie a fitness benefit), as sickle cells are unsuitable for *Plasmodium* to reside in.