Podcast: Magic Mushrooms, Sleeptalking Dolphins, and a Breakthrough for Embryonic Stem Cells

Is a new clinical trial with embryonic stem cells the breakthrough the field has been waiting for? How do magic mushrooms cause hallucinations? And do dolphins speak whale in their sleep? Science's Online News Editor David Grimm chats about these stories and more with Science's Kerry Klein.

(Listen to the full Science podcast and more podcasts.)

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