Written by CHRIS CLAREMONT Penciled by ALAN DAVIS Cover by ALAN DAVIS. High adventure in the Savage Land! The X-Men discover a wondrous and advanced new civilization when they return to the isolated, Antarctic jungle - but it's none too friendly toward humans...or mutants! And could the X-Men have unintentionally helped them take their first steps toward world domination? Plus: The team gains a highly unexpected new member! Collects UNCANNY X-MEN #455-461. 168 PGS./Marvel T+