This week: Wasp venom kills cancer cells, giant sea scorpions from prehistoric seas, smaller particle accelerators, the paleo diet had grains after all, and tapping ocean waves for renewable energy. Brazilian Wasp Venom Kills Cancer and Ignores Healthy Cells A newly published study shows how Brazilian wasp venom selectively kills cancer cells without harming normal cells. The social wasp Polybia paulista protects itself against predators by producing venom known to contain a