![]() ![]() Please fill out the CAPTCHA below and then click the button to indicate that you agree to these terms. Our study addresses a very great current controversy both scientific and non-scientific, says Prof. If you wish to be unblocked, you must agree that you will take immediate steps to rectify this issue. In contrast, during the two million years when, according to the researchers, humans were apex predators, long periods of similarity and continuity were observed in stone tools, regardless of local ecological conditions. If you do not understand what is causing this behavior, please contact us here. If you promise to stop (by clicking the Agree button below), we'll unblock your connection for now, but we will immediately re-block it if we detect additional bad behavior.
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