A new study argues the crossings were deliberate—planned voyages that demanded seaworthy vessels, navigational skill, and knowledge of currents. By all appearances, it required technologically advanced seafaring techniques that most researchers considered unlikely for the Paleolithic era. A few months later, archaeologists discovered a 67,800-year-old hand stencil in a Sulawesi cave, placing symbol-making humans right along that ancient northern migration corridor. By examining microscopic wear on 40,000-year-old stone tools, the Ateneo de Manila team identified traces of plant processing. The leap from plant-processing tools to lashed watercraft remains a highly plausible hypothesis, not a proven blueprint.