What Did the New World Monkeys Do?

Study finds that in kenya, there does seem to be about a millionaire window where humans were around at the same time as chimpensy. So how did these new world monkeys come over from the old world? Well, they think either by a land bridge or by a big floating raft of vegetation that came over. And i have a feeling that it was much more accidental, and it sucked way more than that. I'm sorry. Christian wants to know, i'm he's heard that sign language is total b s. Doyou have opinions on that in general, or pertaining to human- chimpanzee hybrid hybrids for one.