Ancient rock art, giant undersea reservoir, and record solar storm define this week's science

This week’s science roundup spans the world’s oldest known rock art—a 70,000-year-old Sulawesi hand stencil and a 2.6-million-year-old Paranthropus jaw—alongside the discovery of a massive sub-seafloor freshwater reservoir off the U.S. East Coast that could theoretically supply New York City for centuries, plus Earth being hit by one of the largest solar radiation storms in decades, with JWST findings continuing to upend ideas about early black holes.