Pardon me 'cause I think I'm losing my mind. I just read this this morning and now I can't remember where I read it! I thought it was in an email I get from a science news organization containing a daily roundup of recent scientific research. But I can't find it there. It may have been in Science News, but I don't have the copy I was reading this morning at home. As I remember it, it was based on an article published in Nature on Sept. 21. BUT I could be wrong because I get the contents of Nature shipped to me by email and I can't find a listing for Sept 21. Evidently I deleted that particular one. Maybe monday when I go into my office, I will find the source. Sorry. But if you have access to the science journal Nature (should be in the local library), it think it might be in there.
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Hoodoo
I get some pleasure from finding a relentlessly peaceful use for a combative looking knife.
JKM