In a paper published online in the Journal of Comparative Psychology, marine biologists report on 34 interactions spanning two decades in which killer whales (Orcinus orca) in the wild attempted to offer food to humans. The incidents took place in oceans around the world, from California to New Zealand to Norway to Patagonia. The killer whales offered a total of 18 species were: six fishes, five mammals, three invertebrates, two birds, one reptile,...