I listened to the show about sperm this morning on NPRs Science Friday. But somehow I cannot imagine that is news. I'm pretty sure I've seen some HD documentaries which show sperm doing the corkscrew motion. Plus, from Antonie van Leeuwenhoek who first saw (his own) magnified sperm in motion, people weren't stupid and so must have appreciated that they were observing what they could see only in 2 dimensions. So, interesting story, but I think it's being hyped.