Let the majesty of orcas not deceive you: they are intelligent, strategic, and relentless predators in the oceans. An investigation published in the scientific journal Frontiers in Ethology has recorded and documented for the first time a never-before-seen behavior in these cetaceans in the Gulf of California, Mexico. As can be seen in the images, the orcas coordinate to hold and ram a prey, throwing it into the air.

Female sex hormones are responsible for protecting women against drug and opioid abuse in cases of chronic pain, according to a study conducted in mice at Washington University School of Medicine in St. Louis. The study found that male rats self-administer larger amounts of opioids, specifically fentanyl, than female rats in cases of chronic pain, a finding that opens the door to new pain treatments using estrogen.