Daniel Dlamini, a postgraduate student in marine biology at the University of Cape Town, switched on his laptop and checked his email. It was a daily routine. He would get fried hake, thick-cut chips, and a cheap beer from the cart parked outside the harbor, dine on the edge of his boat while the sky darkened from summer to winter blue, then check his email. His mentor, Dr. Samson Saris, was on an expedition and was due to have his reserves restocked, but two months had passed and Saris could not be reached. When Daniel checked his email an hour later, there was a new message in his inbox. With quivering lips and frenzied eyes, he clicked on the link and watched the first video attached to the email. ** He adjusted the camera mounted to the dashboard, smiled broadly,…