This week, we have stories on how ultraviolet rays may have jump-started the first enzymes on Earth, a new fossil find that helps date how quickly birds diversified after the extinction of all the other dinosaurs, and a drug that may help reverse the effects of traumatic brain injury on memory with Online News Editor Catherine Matacic and special guest Carolyn Gramling.

Sarah Crespi talks to Christian Catalini about an experiment in which some early adopters were denied access to new technology and what it means for the dissemination of that tech.

Listen to previous podcasts.

[Image: Michael Wuensch/Creative Commons Music: Jeffrey Cook]

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