Complex sentence: Neoteny has been noted in species similar to humans, like chimpanzees; the neotenous traits within the species that resemble those within humans may give some insight into the evolutionary history of humans.
Split into simpler sentences: Neoteny has been noted in species similar to humans, like chimpanzees. The neotenous traits within the species that resemble those within humans may give some insight into the evolutionary history of humans.