Pam Niedermayer
"Earliest tool known to have survived" would no doubt be more accurate; precision matters in such things. I wonder if it was the writer or editor who committed that faux pas?

Hard to say for sure, had to return that book this morning; but if it's the writer, which I consider unlikely, he should have been corrected by the editor(s). Which is why I so seldom even look at this type book, but the editor made a very good impression on Charlie Rose.

Pam