This week on Lost in Science, Claire chats with veterinary parasitologist Professor Shokoofeh Shamsi about the recent spate of shark encounters and why we still don’t fully understand animal behaviour in these moments. From parasites to changing ocean environments, it turns out there’s a whole ecosystem of missing pieces—and a growing call for deeper research to help us make sense of it all.Meanwhile, Linden takes us back tens of thousands of years to explore groundbreaking discoveries of the oldest known rock art in Sulawesi, Indonesia. What does this ancient artwork reveal about the human journey, cultural development, and the deep histories connected to First Nations Australians?