> In line with this, several decades of observation show that orcas are not naturally violent towards humans. There are no recorded cases of a wild orca killing a human. In a recent BBC Attenborough documentary (I think Frozen Planet) there was a sequence where they showed teams of killer whales swiftly swimming just under the surface to create a wave in an attempt to knock a seal off an ice flow so that they could e…
http://www.davidspilmanfinebooks.com/pages/books/13027/aspey...
You don't have to pay $350 for the print version, it's on Gutenberg