Here's another interesting piece: https://www.smithsonianmag.com/smart-news/male-orca-and-its-mother-worked-together-kill-newborn-calf-180968590/ https://www.s

Here's another interesting piece: https://www.smithsonianmag.com/smart-news/male-orca-and-its-mother-worked-together-kill-newborn-calf-180968590/ https://www.smithsonianmag.com/smart-news/male-orca-and-its-... A young male orca and its mother kills a orca baby by drowning it during four hours, with the baby orca's mother nearby. The researchers are guessing they did it so that the other mother orca that had just had its baby killed could be impregnated by the young male orca, thereby making sure that its genetics would be spread.