My father and I are both interested in Neanderthals. Unlike me, my father takes a negative attitude against them. He believes primitive behavior in human beings derives from our shared Neanderthal ancestry. I don't think his attitudes ever evolved from the "caveman" stereotype common on television from the 1950s and on. I think we should keep an open mind about Neanderthals and not be guilty of retrospective racism. After all, none of us has ever met a Neanderthal in person nor spoken with him.
I wonder whether it is true that Neanderthal ancestry is mostly present in non-African people. Apparently, those with red hair and pale skin are more Neanderthal than others. I read an interesting article about Neanderthal research today.
Besides invisibility, one my great wishes would be to travel backward in time and just be a spirit hovering about, at different times, in the homes of every one of my ancestors. I would like to observe their lives even from a distance, even if I were not permitted to intervene in any way. I think that would be a fun and revelatory way to spend the afterlife. Yet surely, for any observer of real events, there would be at some point a temptation to intervene in some way, wouldn't there? One would desire most of all the power to communicate. Modern science allows us a dim, out-of-focus window into the lives of our distant ancestors, but much remains obscure, and there will never be a way to communicate with our ancestors unless the final great mystery, time travel, is unravelled.