Regarding “Whales Drink Sounds: Hearing may use an ancient path” (SN: 2/9/08, p. 84), I have heard that whales evolved millions of years ago into their present form, including their very large brains. We humans must be relatively recent in terms of our brain structures. Are there data concerning evolutionary development in whales?
Matthew Kabrisky Dayton, Ohio
“Learning to Listen: How some vertebrates evolved biological sonar” (SN: 5/14/05, p.
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