biochronology
... that a biochronology based on mammal fossils is defined for every continent except Antarctica?
... that a <b id="mwB8Q"><a href="./Biochronology" id="mwB8U" rel="mw:WikiLink" title="Biochronology">biochronology</a></b> based on mammal fossils is defined for every continent except <a href="./Antarctica" id="mwB8Y" rel="mw:WikiLink" title="Antarctica">Antarctica</a>?