🔄FROM THE ARCHIVE: Language, culture, self-awareness, and brain size contribute to some of our closest competitors in the cognition arena.
“They have culture, they use tools, they have complex societies,” says Neuroscientist Lori Marino, the president of The Whale Sanctuary Project who has studied dolphin brains and intelligence for 30 years. “These animals are very much like us because of their social complexities, their behavior, their level of self-awareness.”Simply put, it’s about relative brain size.
Brain size alone doesn’t mark intelligence, though — and Thewissen says that he believes part of this jump in delphinids and other cetaceans likely occurred as their ancestors developed the capacity to use echolocation to hunt their prey.Learning to understand dolphins sometimes entails understanding our own way of thinking about things.
The first scientific attempts to assess dolphin intelligence in a serious way came in the 1950s and 1960s with John Lilly, a scientist that studied bottlenose dolphin vocalization. Lilly’s early work laid the groundwork for studying dolphin brains and intelligence. “That was the first time cetaceans were shown to have that capacity, which was thought to be limited to humans and our closest relatives,” she says. “That’s something that most animals don’t do.”
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