Looked up domesticated silver foxes. Interesting. Didn't look too hard, but maybe breeding for domestication is partly what causes the "internal conflict" that this article suggests is responsible for barking?
Since my first comment is still, for some reason, waiting for moderation, one way it's an improvement is that being able to grasp the key ring firmly by the protrusion would make it easier to slide other keys onto the ring. Another improvement it could make would be if there is one key that is used predominantly, or one that needs to be found quickly, this key would really cut down on the time spent fumbling and sorting.
I'm betting the key blank is part of only one of the two loops (for lack of a better term) that make up a typical key ring, which would let you spin additional keys all the way around. Come to think of it, being able to use the key portion as a handle would probably make it a lot easier to manipulate the ring proper.
I grew up in Union City (zoom out twice and show labels on the Google map). Those pictures make me sentimental. I wouldn't call these San Francisco's salt ponds, though. They're the San Francisco Bay's salt ponds.
Of course, this isn't the first time we've found evidence that earlier humans took care of individuals that couldn't take care of themselves. At the Shanidar site in Iraq, for example, an older Neandertal male was buried who had been partially blind, one-armed, and crippled. His injuries had all taken place years before his death, even though the extent of his injuries mean that he wouldn't have been able to provide for himself, which leads to the obvious conclusion that his community helped him.
This discovery just pushes evidence of such behavior much farther into the past.
Agree with Gaulder. Women are better multitaskers, which presumably means that even as they focus on other things and benefit from that alternate focus, part of their brains would still be keeping track of hunger.
This discovery just pushes evidence of such behavior much farther into the past.