For the fifth time in three years, a group of orcas has sunk a ship in southwest Europe. This time an unknown number of killer whales attacked a 50-foot sailing yacht in the Strait of Gibraltar, ripped open its hull and sent the boat to the seafloor. Live Science has more, including what happened to the crew and why researchers believe the attacks are a learned behavior that could increase in the coming months. https://flip.it/0KoMeL #Science#KillerWhales#Orcas#Europe
