Tooth analysis rules out Japan as Native American homeland; medieval knowledge of North America in Italy; Azorean lake sediments indicate early human settlement; 6-million-year-old hominin footprints in Crete
Analysis of teeth shows early Native Americans did not come from Japan
Medieval document suggests Italians heard about America 150 years before Columbus
Lake sediments challenge history of human habitation in the Azores
Earliest hominin footprints from Crete now dated to 6 million years ago