Orcas Tied to South Africa's Vanishing Great White Sharks, Stirring Conservation Debate

60 Minutes reports that great white sharks off Cape Town have vanished, sparking a scientific dispute over whether orcas are preying on them (evidenced by surgical‑style bite marks and necropsies showing liver predation) or humans—via longlining and shark nets—are depleting prey and killing sharks; the piece follows the orca pair Port and Starboard and argues for nonlethal protections and smarter, balanced ocean management, while some scientists say the population may be stable and the mystery persists.