Because humans have been around for a relatively short time by evolutionary standards, scientists say that there is not enough genetic diversity in humans to allow us to be divided into neat, racial cubbyholes or subspecies. .
Because humans have been around for a relatively short time by evolutionary standards, scientists say that there is not enough genetic diversity in humans to allow us to be divided into neat, racial cubbyholes or subspecies. .
因为就进化的标准来说，人类的存在相对较短，因此科学家认为，人类的基因不够的多样化，还不足以划为纯粹的种族分支或亚种。