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Press Release 04-146
Humans and Dolphins: If Brain Size is a Measure, We're Not That Different
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Mean encephalization quotients of archaeocete and
odontocete cetacean species over time. Scales for both raw EQ0.67 and log10 EQ0.67 are shown across the bottom. Archaeocetes are shown in blue squares; delphinoid odontocetes are shown in green circles; non-delphinoid odontocetes are shown in red triangles. Time scale is in millions of years. Note the large shift in EQ at the origin of Odontoceti, and that the Delphinoidea form the upper range of odontocete EQ values from the middle Miocene to Recent.
Credit: Lori Marino, Emory University |
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