[crazyhorse691]

The investigators discovered modern humans possess larger olfactory bulbs at the base of their brains. This area is linked primarily with smell,

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So, homo sapien sapien was more successful because they could out-compete in finding a mate in heat, food, or better lodging? Sounds like a dorm brainstorming session.

[The Antiyuppie]

I think, with my superior brain :), that we will manage to become extinct faster than they did - so which species will prove to be “smarter”? Time will tell.