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I've started listening to podcasts of SOF and was playing the conversation on stem cells in the car yesterday when my 12-year old son got interested. He normally wants no conversation, no radio when we are driving to or from school. This morning he wanted to hear more. You've made a hit with a soon-to-be teenager. He had some rather insightful and teenager comments about recycling embryos, not putting them in the trash.

The video on the pig's heart was stunning. Where are the images of the beating rat heart?

I like the podcast feature because it lets me listen to conversations again, and again, and again.