anjou, I doubt that people would be using stone tool technology that was over 100, 000 years old. No, even stone tools develop at a rate that would make them useless for the succeeding generations. If the tools were found there, they were either made there or brought there by people with direct contact to those who made them. If the tools were brought by a more recent human arrival, they would have been reworked, sharpened perhaps? A person living 15,000 years ago would look at a hand axe like my 10 year cousin would look at record
player. Why would I use that when I have a 32 gig ipod touch? Besides, the article says the tool technology matches 700,000 thousand year old specifications! Imagine being an advanced human with complex stone tool flinting abilities, cultural support systems and hundreds of thousands of years accumlated tool technology and then picking up a crude, heavy, dull hand axe and saying, "gee, this axe is great! I should bring it on this long dangerous boat trip!"
I think this is a great discovery that might shine some light on our past. I don't find it surprising that seafaring technology is much older than is generally thought....people have been people for a lot longer than 100,000 years. People are smart and cultures develop relatively quickly, allowing for specialization in many environments including the sea.
What would really be surprising is if the Aquatic Ape Hypothesis ( Aquatic ape hypothesis - Wikipedia, the free encyclopedia
) is proved correct! That would be a total mind bender!!