When I first read the news that scientists are finding evidence that our ancient ancestors interbred with other hominid species, I immediately thought, "Rishathra!" Since I know a significant minority of underprivileged readers are likely unfamiliar with Larry Niven's Ringworld series, I figured a link to the definition of the term would be in order. When I go there what do I find? Someone's already updated the entry to reflect the new science. Wikipedia. Such a wonderful thing.