Podcast: Brain Shrinkage, Black Hole Collisions, and Electro-Sensing Dolphins

David is the Online News Editor of Science.

Why does the human brain shrink with age? Can dolphins sense electricity? And did the Milky Way's black hole collide with another black hole just a few million years ago? Science's Online News Editor David Grimm chats about these stories and more with Science's Kerry Klein.

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Posted in Space, Plants & Animals, Brain & Behavior podcast