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Smart, Social and Erratic in Captivity - The New York Times
The Life of an Orca: The Killer Whale - From Birth to Adulthood
More Than 50 Orcas Hunt and Kill Blue Whale Off Australian Coast | Smart News| Smithsonian Magazine
The Social Intelligence of Orcas and Communication – Orca Series II – OrcaNation
Killer Whale Hunting Strategies
The Social Intelligence of Orcas and Communication – Orca Series II – OrcaNation
Why did Tilikum, the highly intelligent, 12,000 pound Orca, kill his trainer? Gabriela Cowperthwaite, director of the documentary 'Blackfish,' on why SeaWorld needs to end its mad-science experiment on killer whales. :
This Is Why Orcas Are One Of The Smartest Animals - YouTube
Killer whales are so smart they can learn to speak "dolphin"
Inside the mind of a killer whale: A Q+A with the neuroscientist from 'Blackfish' | The Raptor Lab
How smart are killer whales? Orcas have 2nd-biggest brains of all marine mammals
Bonus Episode: The secret culture of killer whales
Study: Humans cause more orca deaths than previously understood - OPB
Killer whales are so smart they can learn to speak "dolphin"
Killer whale Wikie is first orca to mimic human words as researchers claim breakthrough - CBS News