Orcas in Resurrection Bay near Kenai Fjords National Park, Alaska (© Steven Kazlowski/SuperStock)

【September 22 2014】Orcas, or killer whales, continue to surprise and intrigue scientists. It’s believed that there are at least three distinct types of orca – diverse enough that some marine biologists consider them different subspecies and perhaps even different species altogether.Explore breathtaking Gallery from the HuluTrip homepage over the past 5 years..